CN102356682B - Wireless communication terminal device, wireless communication base station device, and resource region setting method - Google Patents

Wireless communication terminal device, wireless communication base station device, and resource region setting method Download PDF

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Publication number
CN102356682B
CN102356682B CN201080012149.1A CN201080012149A CN102356682B CN 102356682 B CN102356682 B CN 102356682B CN 201080012149 A CN201080012149 A CN 201080012149A CN 102356682 B CN102356682 B CN 102356682B
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frequency band
unit frequency
descending
unit
descending unit
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CN102356682A (en
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西尾昭彦
中尾正悟
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Sun Patent Trust Inc
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Panasonic Intellectual Property Corp of America
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2626—Arrangements specific to the transmitter only
    • H04L27/2627—Modulators
    • H04L27/2634—Inverse fast Fourier transform [IFFT] or inverse discrete Fourier transform [IDFT] modulators in combination with other circuits for modulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2647—Arrangements specific to the receiver only
    • H04L27/2649—Demodulators
    • H04L27/26524—Fast Fourier transform [FFT] or discrete Fourier transform [DFT] demodulators in combination with other circuits for demodulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0055—Physical resource allocation for ACK/NACK
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0014—Three-dimensional division
    • H04L5/0016—Time-frequency-code
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • Discrete Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Quality & Reliability (AREA)
  • Multimedia (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

A terminal capable of reducing the resource regions in an uplink component band without increasing signaling even if a plurality of acknowledgment signals to downlink data transmitted respectively in a plurality of downlink component bands are transmitted from one uplink component band. A terminal (200) for making communication using the plurality of downlink component bands, wherein a PCFICH reception section (208) obtains CFI information indicating the number of symbols used for a control channel to which resource allocation information relating to downlink data addressed to a device is allocated for each of the downlink component bands, a mapping section (214); sets a resource region to which an acknowledgment signal to the downlink data is allocated for each of the plurality of downlink component bands according to the CFI information of each of the downlink component bands in an uplink component band set to the device, and maps the acknowledgment signals into the resource regions corresponding to the downlink component bands used for the allocation of the downlink data.

Description

Radio communication terminal device, radio communication base station device and resource area establishing method
Technical field
The present invention relates to radio communication terminal device, radio communication base station device and resource area establishing method.
Background technology
At 3GPP-LTE (3rd Generation Partnership Project Radio Access Network Long Term Evolution: third generation partner program wireless access network Long Term Evolution, below, be called LTE) in, adopt OFDMA (Orthogonal Frequency Division Multiple Access: OFDM) as the communication mode of downgoing line, adopt SC-FDMA (Single Carrier Frequency Division Multiple Access: single-carrier frequency division multiple access) as the communication mode of uplink (for example, with reference to non-patent literature 1, 2 and 3).
In LTE, radio communication base station device is (following, economize slightly " base station ") by the Resource Block in band system band (Resource Block:RB) is distributed to radio communication terminal device (below to be called as the time per unit of subframe, economize slightly " terminal "), thus communicate.In addition, base station is by for notifying the control information of the resource allocation result of downlink data and uplink data to send to terminal.This control information is for example used the downgoing line control channels such as PDCCH (Physical Downlink Control Channel, physical downlink control channel) send to terminal.Here, each PDCCH takies the resource consisting of 1 or continuous a plurality of CCE (Control Channel Element, control channel unit).In addition, in LTE, support to have the frequency band of bandwidth of maximum 20MHz as system bandwidth.
In addition, PDCCH is sent out in the 3OFDM code element of each subframe beginning.In addition, the OFDM code element number using in the transmission of PDCCH can be controlled with subframe unit, and according to PCFICH (the Physical Control Format Indicator Channel: the Physical Control Format Indicator Channel) CFI of notice (Control Format Indicator: control format indication) information is controlled using with the OFDM code element transmission of each subframe beginning.
In addition, base station is to a plurality of terminals of a sub-frame allocation, so send a plurality of PDCCH simultaneously.Now, base station is in order to identify the terminal of the sending destination of each PDCCH, and the CRC bit that the Termination ID with sending destination has been carried out shielding (masking) (or scrambling) gained is included in PDCCH and sends.Then, in likely mailing to a plurality of PDCCH of this terminal, the Termination ID that terminal is utilized this terminal is to CRC bit (demasking) (or the descrambling) that demask, thereby PDCCH is carried out blind decoding and detects the PDCCH that mails to this terminal.
In addition, the number of times of cutting down the blind decoding in terminal of take is object, and studying the object that each terminal is limited to blind decoding is the method for CCE.In the method, each terminal is limited to the CCE region (following, to be called search volume (Search Space)) as blind decoding object.Thus, each terminal is only carried out blind decoding for the CCE having distributed in the search volume of this terminal, therefore can cut down the number of times of blind decoding.Here, use the Termination ID of each terminal and as Hash (hash) function that carries out randomized function, set the search volume of each terminal.
In addition, for mail to the downlink data of terminal from base station, terminal feeds back to base station by the response signal (hereinafter referred to as ack/nack signal) that represents the error detection result of downlink data.By this ack/nack signal, for example, use the uplink control channels such as PUCCH (Physical Uplink Control Channel, Physical Uplink Control Channel) to send to base station.Here, in order to save that PUCCH for the transmission of ack/nack signal is used notifies from base station to the signaling of each terminal and the communication resource that uses expeditiously downgoing line, will distribute No. CCE of downlink data with associated for sending the resource number of the PUCCH of the ack/nack signal of this downlink data.Each terminal can be according to this association, from the mapped CCE that mails to the control information of this terminal, judges the PUCCH using in the transmission from the ack/nack signal of this terminal.In addition, ack/nack signal means 1 bit signal of ACK (zero defect) or NACK (having mistake), carries out BPSK (Binary Phase Shift Keying: two-phase PSK) be sent out after modulation.In addition, base station can freely be set in the resource area of the PUCCH using in the transmission of ack/nack signal, and the beginning resource number of the resource area of PUCCH is notified to all terminals that are positioned at the community of this base station by broadcast message.
In addition, the PUCCH transmission power control bit that the transmitted power that terminal is used in PUCCH sends comprises in by PDCCH is controlled.
In addition, started to realize the standardization of the senior 3GPP LTE (3GPP LTE-Advanced) (following, to be called LTE-A) of the high speed of further communicating by letter than LTE.In LTE-A, in order to realize more than maximum 1Gbps downlink transfer speed and uplink speed more than maximum 500Mbps, estimate to import base station and the terminal (following, to be called LTE-A terminal) that can communicate with wideband frequency more than 40MHz.In addition, LTE-A system is not only required to take in LTE-A terminal, is also required to take in the terminal corresponding with LTE system (hereinafter referred to as LTE terminal).
In LTE-A, in order to realize broadband connections more than 40MHz, proposed to link frequency band polymerization (Band aggregation) mode (for example,, with reference to non-patent literature 1) of a plurality of frequency bands for communications.For example,, using the frequency band of bandwidth with 20MHz as the base unit of communication band (following, to be called unit frequency band (component band)).Therefore, in LTE-A, for example, by linking Liang Ge unit's frequency band, realize the system bandwidth of 40MHz.
In addition, in LTE-A, can consider that base station used the descending unit frequency band of each unit frequency band terminal to be notified to the resource allocation information (for example, non-patent literature 4) of each unit frequency band.For example, carry out the terminal (using the terminal of Liang Ge unit's frequency band) of the wideband transmit of 40MHz, by reception, be configured to the PDCCH of the descending unit frequency band of each unit frequency band, thereby obtain the resource allocation information of Liang Ge unit's frequency band.
In addition, in LTE-A, the volume of transmitted data of also envisioning in each circuit of uplink and downgoing line is separate.For example, may have and in downgoing line, carry out wideband transmit (communication band of 40MHz), in uplink, carry out the situation of narrow band transmission (communication band of 20MHz).In this case, for terminal, in downgoing line, use two descending unit frequency bands, in uplink, only use a up unit frequency band.That is, in uplink and downgoing line, use asymmetrical unit frequency band (for example,, with reference to non-patent literature 5).Now, the ack/nack signal to the downlink data having sent respectively with two descending unit frequency bands, is all used and is configured to ACK/NACK resource in the PUCCH of a up unit frequency band and send it to base station.
In addition, even if also studying in the situation that use the unit frequency band of equal number in uplink and downgoing line, same with the situation of the above-mentioned asymmetrical unit of use frequency band, from up unit frequency band, send a plurality of ack/nack signals of the downlink data to having sent respectively with a plurality of descending units frequency band.Here, to each terminal set independently from a plurality of up units frequency band, which up unit frequency band sends ack/nack signal.
Prior art document
Non-patent literature
Non-patent literature 1:3GPP TS36.211V8.3.0, " Physical Channels and Modulation (Release8), " May2008
Non-patent literature 2:3GPP TS36.212V8.3.0, " Multiplexing and channel coding (Release8), " May2008
Non-patent literature 3:3GPP TS36.213V8.3.0, " Physical layer procedures (Release8), " May2008
Non-patent literature 4:3GPP TSG RAN WG1meeting, R1-082468, " Carrier aggregation LTE-Advanced, " July2008
Non-patent literature 5:3GPP TSG RAN WG1meeting, R1-090813, " PUCCH design for carrier aggregation, " February2009
Summary of the invention
The problem that invention will solve
In the situation that send a plurality of ack/nack signals of the downlink data to having sent respectively with a plurality of descending units frequency band from a up unit frequency band, need to make the ack/nack signal of the downlink data to having sent respectively with each descending unit frequency band mutually not clash.That is to say, in each up unit frequency band, need to set respectively the resource area (hereinafter referred to as PUCCH region) for sending the PUCCH of ack/nack signal to each unit frequency band of all descending units frequency band.
Here, to each up unit band setting, corresponding with each descending unit frequency band PUCCH region, need to guarantee sufficient resource area to hold the ack/nack signal of the downlink data to having sent from each descending unit frequency band.This is because ACK/NACK resource is associated by 1 pair of 1 ground with CCE.Therefore, increase along with descending unit frequency band number, in each up unit frequency band, need the PUCCH region (ACK/NACK number of resources) of guaranteeing to increase, the ascending resource of the uplink data of distributing terminals (for example, PUSCH (Physical Uplink Shared Channel)) lacks.Thus, the data throughout of uplink declines.
In addition, the PUCCH region corresponding with each descending unit frequency band notified respectively with broadcast message in base station.Here, in a plurality of up units frequency band, need to set above-mentioned PUCCH region, so the PUCCH region of each descending unit frequency band, with the broadcast message of the descending unit frequency band with each up unit frequency band associated (in pairs), is notified in base station.That is to say, for each up unit frequency band, need the relevant information (broadcast message) in the notice PUCCH region corresponding with all descending units frequency bands.Therefore, the data throughout of downgoing line declines because the expense of the broadcast message of downgoing line increases.
The object of the invention is to, even if provide from a up unit frequency band, send the situation of a plurality of ack/nack signals of the downlink data to having sent respectively with a plurality of descending units frequency band, also signaling be can not increase, and terminal, base station and the resource area establishing method in the PUCCH region (ACK/NACK number of resources) in up unit frequency band reduced.
The scheme of dealing with problems
Terminal of the present invention is to use the radio communication terminal device of a plurality of descending units frequency bands for communication, its structure adopting comprises: receiving element, receive the CFI information of the 1st associated descending unit frequency band of the up unit frequency band with being set in this device in described a plurality of descending units frequency band, the CFI information of described the 1st descending unit frequency band is distributed in the transmission power control field of the control channel that is configured in the 2nd descending unit frequency band different from described the 1st descending unit frequency band, reception is disposed at the CFI information of described the 2nd descending unit frequency band of the CFI information channel of described the 2nd descending unit frequency band, reception is allocated in the transmitting power control signal of the transmission power control field of the control channel that is configured in described the 1st descending unit channel, described CFI information table is shown in the code element number using in the control channel of the resource allocation information that has distributed the downlink data that mails to described device, setup unit, in the up unit frequency band that described device set, the described CFI information of the k-1 based in described a plurality of descending units frequency band descending unit frequency band, each descending unit frequency band to described a plurality of descending units frequency band, setting has distributed k resource area in the described up unit frequency band of the response signal of the downlink data with k descending unit frequency band transmission, and k is more than 1 integer, and map unit, the response signal corresponding with described downlink data that described use k descending unit frequency band sent is mapped to k resource area in described up unit frequency band.
The structure that base station of the present invention adopts comprises: generation unit, for the radio communication terminal device that uses a plurality of descending units frequency bands for communication, each descending unit frequency band to described a plurality of descending units frequency band generates CFI information, and described CFI information table is shown in the code element number using in the control channel of the resource allocation information that has distributed the downlink data that mails to described radio communication terminal device, transmitting element, send the CFI information of the 1st descending unit frequency band associated with up unit frequency band in described a plurality of descending units frequency band, the CFI information of described the 1st descending unit frequency band is distributed in the transmission power control field of the control channel that is configured in the 2nd descending unit frequency band different from described the 1st descending unit frequency band, transmission is disposed at the CFI information of described the 2nd descending unit frequency band of the CFI information channel of described the 2nd descending unit frequency band, transmission is allocated in the transmitting power control signal of the transmission power control field of the control channel that is configured in described the 1st descending unit channel, and receiving element, in the up unit frequency band that described radio communication terminal device is set, the CFI information of the k-1 based in described a plurality of descending units frequency band descending unit frequency band, determine and to have distributed the response signal of the downlink data with k descending unit frequency band transmission, k resource area in up unit frequency band, k is more than 1 integer, resource area in described up unit frequency band is to each the descending unit band setting in described a plurality of descending units frequency band, in k resource area from described up unit frequency band corresponding to the descending unit frequency band of the distribution use with described downlink data, extract described response signal.
The method of carrying out in using the radio communication terminal device of a plurality of descending units frequency bands for communication of the present invention comprises the following steps: the CFI information that receives the 1st associated descending unit frequency band of the up unit frequency band with being set in this device in described a plurality of descending units frequency band, the CFI information of described the 1st descending unit frequency band is distributed in the transmission power control field of the control channel that is configured in the 2nd descending unit frequency band different from described the 1st descending unit frequency band, reception is disposed at the CFI information of described the 2nd descending unit frequency band of the CFI information channel of described the 2nd descending unit frequency band, reception is allocated in the step of transmitting power control signal of the transmission power control field of the control channel that is configured in described the 1st descending unit channel, described CFI information table is shown in the code element number using in the control channel of the resource allocation information that has distributed the downlink data that mails to described radio communication terminal device, and in the up unit frequency band that described radio communication terminal device is set, the CFI information of the k-1 based in described a plurality of descending units frequency band descending unit frequency band, each descending unit frequency band to described a plurality of descending units frequency band, setting has distributed the step to k resource area in the described up unit frequency band of the response signal of the described downlink data with k descending unit frequency band transmission, and k is 1 above integer.
The method of carrying out at radio communication base station device of the present invention, comprise the following steps: for the radio communication terminal device that uses a plurality of descending units frequency bands for communication, the step that each descending unit frequency band of described a plurality of descending units frequency band is generated to control format indication information, described control format indication information is illustrated in the code element number using in the control channel of the resource allocation information that has distributed the downlink data that mails to described radio communication terminal device, send the control format indication information of the 1st descending unit frequency band associated with up unit frequency band in described a plurality of descending units frequency band, the control format indication information of described the 1st descending unit frequency band is distributed in the transmission power control field of the control channel that is configured in the 2nd descending unit frequency band different from described the 1st descending unit frequency band, transmission is disposed at the control format indication information of described the 2nd descending unit frequency band of the control format indication information channel of described the 2nd descending unit frequency band, transmission is allocated in the step of transmitting power control signal of the transmission power control field of the control channel that is configured in described the 1st descending unit channel, and in the up unit frequency band that described radio communication terminal device set, the described control format indication information of the k-1 based in described a plurality of descending units frequency band descending unit frequency band, determine and to have distributed the response signal of the downlink data with k descending unit frequency band transmission, k resource area in up unit frequency band, k is more than 1 integer, resource area in described up unit frequency band is to each the descending unit band setting in described a plurality of descending units frequency band, in k resource area from described up unit frequency band corresponding to the descending unit frequency band of the distribution use with described downlink data, extract described response signal.
The effect of invention
According to the present invention, even send the situation of a plurality of ack/nack signals of the downlink data to having sent respectively with a plurality of descending units frequency band from a up unit frequency band, also can not increase signaling, and reduce the PUCCH region (ACK/NACK number of resources) in up unit frequency band.
Accompanying drawing explanation
Fig. 1 means the block diagram of structure of the base station of embodiments of the present invention 1.
Fig. 2 means the block diagram of structure of the terminal of embodiment of the present invention 1.
Fig. 3 means the figure of resource of the PUCCH associated with each CCE of embodiments of the present invention 1.
Fig. 4 means the figure of setting in the PUCCH region of embodiments of the present invention 1.
Fig. 5 means the figure (establishing method 1) of setting in the PUCCH region of embodiments of the present invention 2.
Fig. 6 means the figure (establishing method 1) of setting in the PUCCH region of embodiments of the present invention 2.
Fig. 7 means the figure (establishing method 2) of setting in the PUCCH region of embodiments of the present invention 2.
Fig. 8 means the figure (in asymmetrical situation) of setting in the PUCCH region of embodiments of the present invention 2.
Fig. 9 means the figure of setting in the PUCCH region of embodiments of the present invention 3.
Figure 10 means the figure of setting in the PUCCH region of embodiments of the present invention 4.
Label declaration
100 base stations
200 terminals
101 setup units
102 control units
103 PDCCH generation units
104,107,109,110,211,212 modulating units
105 allocation units
106 PCFICH generation units
108 broadcast message generation units
111 Multiplexing Units
112,215 IFFT unit
113,216 CP extra cells
114,217 radio frequency transmitting elements
115,201 antennas
116,202 rf receiver units
117,203 CP removal units
118,204 FFT unit
119 extraction units
120 IDFT unit
121 data receiver unit
122 ACK/NACK receiving elements
205 separative elements
206 broadcast message receiving elements
207 set information receiving elements
208 PCFICH receiving elements
209 PDCCH receiving elements
210 PDSCH receiving elements
213 DFT unit `
214 map unit
Embodiment
Below, the execution mode that present invention will be described in detail with reference to the accompanying.In addition, in execution mode, to the additional identical label of identical structural element, its explanation is omitted because of repetition.
In addition, in the following description, suppose downgoing line and the uplink system that You Liangge unit's frequency band forms respectively.In addition, base station is used the PDCCH that is configured in two descending unit frequency bands to carry out the distribution of downlink data, and sends downlink data to terminal.In addition, terminal will feed back to base station to the PUCCH that uses the ack/nack signal use of the downlink data of two descending unit frequency bands transmissions to be configured in a up unit frequency band.
(execution mode 1)
Fig. 1 means the block diagram of structure of the base station 100 of present embodiment.
In the base station 100 shown in Fig. 1, setup unit 101, for example according to required transmission rate or volume of transmitted data, sets to each terminal one or more units frequency band that (configure) used respectively in uplink and downgoing line.For example, setup unit 101 is set in the up unit frequency band of use in data transmission and the up unit frequency band of descending unit frequency band and use in PUCCH sends.In addition, setup unit 101, by comprising the set information of the unit frequency band that each terminal has been set, outputs to control unit 102, PDCCH generation unit 103 and modulating unit 107.
Control unit 102 generate for represent distributing terminals uplink data ascending resource (for example, PUSCH) ascending resource assignment information and the downlink resource that represent to distribute the downlink data that mails to terminal are (for example, PDSCH (Physical Downlink Shared Channel, physical down link sharing channel)) downlink resource assignment information.Then, control unit 102 outputs to PDCCH generation unit 103 and extraction unit 119 by ascending resource assignment information, and downlink resource assignment information is outputed to PDCCH generation unit 103 and Multiplexing Unit 111.Here, the set information of control unit 102 based on from setup unit 101 input, distributes to ascending resource assignment information and downlink resource assignment information the PDCCH that is configured to the descending unit frequency band that each terminal has been set.Particularly, control unit 102 is distributed to downlink resource assignment information the PDCCH of the descending unit frequency band that is configured in the represented resource distribution object of this downlink resource assignment information.In addition, control unit 102 is distributed to ascending resource assignment information the PDCCH that is configured in the associated descending unit frequency band of the up unit frequency band of the resource distribution object represented with this uplink assignment information.In addition, PDCCH consists of one or more CCE.In addition, propagation path quality (the CQI:Channel Quality Indicator of the terminal based on distributing, CQI) and control information size, the CCE number that base station 100 is used is set as terminal can be with the error rate receiving control information of abundant necessity.In addition, control unit 102 for example, based on (being assigned with control information in each descending unit frequency band, assignment information) the CCE number that PDCCH is used, each descending unit frequency band is determined to the OFDM code element number using in the transmission of PDCCH, and generate for representing the CFI information of determined OFDM code element number.That is to say, control unit 102 is for the terminal of using a plurality of descending units frequency bands for communication, each unit frequency band to a plurality of descending units frequency band generates CFI information, and this CFI information table is shown in the code element number using in the PDCCH of the resource allocation information (ascending resource assignment information or downlink resource assignment information) that has been assigned with the downlink data that mails to terminal.In addition, control unit 102 outputs to PCFICH generation unit 106, Multiplexing Unit 111 and ACK/NACK receiving element 122 by the CFI information of each descending unit frequency band.
PDCCH generation unit 103 generates and comprises from the ascending resource assignment information of control unit 102 inputs and the PDCCH signal of downlink resource assignment information.In addition, 103 pairs of PDCCH generation units have been assigned with the additional CRC bit of PDCCH signal of ascending resource assignment information and downlink resource assignment information, and then CRC bit is shielded to (or scrambling) with Termination ID.Then, PDCCH generation unit 103 outputs to modulating unit 104 by the PDCCH signal after shielding.
104 pairs of PDCCH signals of inputting from PDCCH generation unit 103 of modulating unit carry out modulating chnnel coding, and the PDCCH signal after modulation is outputed to allocation units 105.
Allocation units 105 are the PDCCH signal of each terminal from modulating unit 104 input, distribute to respectively the CCE in the search volume of each terminal in the descending unit frequency band of constituent parts frequency band.For example, allocation units 105 are according to being used the Termination ID of each terminal and carrying out No. CCE that randomized hash function calculates and form the CCE number (L) of search volume, calculate the search volume of each unit frequency band of a plurality of descending unit frequency band that each terminal has been set.That is to say, allocation units 105 will be used Termination ID and the hash function starting position that calculate, that be set as the search volume of this terminal for No. CCE (No. CCE) of certain terminal, and by from starting position to the continuous search volume that is equivalent to be set as till CCE that CCE counts L this terminal.Here, allocation units 105, between a plurality of descending unit frequency band that each terminal has been set, are set same search volume (search volume consisting of the CCE of same No. CCE).Then, allocation units 105 output to Multiplexing Unit 111 by the PDCCH signal of having distributed to CCE.In addition, allocation units 105 by distributed PDCCH signal CCE output to ACK/NACK receiving element 122 No. CCE.
The CFI information of each the descending unit frequency band of PCFICH generation unit 106 based on from control unit 102 inputs, generates PCFICH signal.For example, PCFICH generation unit 106 is encoded the CFI information of 2 bits of each descending unit frequency band (CFI bit) and is generated the information of 32 bits, and generates PCFICH signal by the information of 32 bits that generated is carried out to QPSK modulation.Then, PCFICH generation unit 106 outputs to Multiplexing Unit 111 by generated PCFICH signal.
Modulating unit 107 will be modulated from the set information of setup unit 101 inputs, and the set information after modulation is outputed to Multiplexing Unit 111.
Broadcast message generation unit 108 is set the operation parameter (system information (SIB:System Information Block (system information block))) of the community of these base stations, and generates the broadcast message that comprises the system information (SIB) of having set.Here, the 100 use descending unit frequency band associated with each up unit frequency band in base station broadcasted the system information of each up unit frequency band.In addition, the PUCCH area information etc. that has the starting position (resource number) in the PUCCH region of using as the system information of up unit frequency band in representing the transmission of ack/nack signal.Then, broadcast message generation unit 108 outputs to modulating unit 109 by the broadcast message of the system information of the community that comprises this base station (SIB), and the system information of the community of described this base station (SIB) comprises PUCCH area information etc.
Modulating unit 109 will be modulated from the broadcast message of broadcast message generation unit 108 inputs, and the broadcast message after modulation is outputed to Multiplexing Unit 111.
Modulating unit 110 carries out the transmission data (downlink data) of input to modulate after chnnel coding, and the transmission data-signal after modulation is outputed to Multiplexing Unit 111.
Multiplexing Unit 111 is by the PDCCH signal from allocation units 105 inputs, the PCFICH signal from 106 inputs of PCFICH generation unit, the set information of inputting from modulating unit 107, the broadcast message of inputting from modulating unit 109 and carry out multiplexing from the data-signal (being PDSCH signal) of modulating unit 110 inputs.Here, the CFI information of Multiplexing Unit 111 based on from control unit 102 inputs, determines the OFDM code element number to PDCCH configuration to each descending unit frequency band.In addition, the downlink resource assignment information of Multiplexing Unit 111 based on from control unit 102 inputs, is mapped to each descending unit frequency band by PDCCH signal and data-signal (PDSCH signal).In addition, Multiplexing Unit 111 also can be mapped to PDSCH by set information.Then, Multiplexing Unit 111 outputs to IFFT (Inverse Fast Fourier Transform, invert fast fourier transformation) unit 112 by multiplexed signals.
IFFT unit 112 will be transformed to time waveform from the multiplexed signals of Multiplexing Unit 111 inputs, and CP (Cyclic Prefix, Cyclic Prefix) extra cell 113 appends to CP in this time waveform, obtains thus ofdm signal.
Radio frequency transmitting element 114 carries out wireless transmission processing (up-conversion, D/A conversion etc.) for the ofdm signal from 113 inputs of CP extra cell, and it is sent via antenna 115.
On the other hand, rf receiver unit 116 carries out wireless receiving processing (down-conversion, A/D conversion etc.) for the wireless receiving signal receiving with frequency acceptance band via antenna 115, and the reception signal of acquisition is outputed to CP removal unit 117.
CP removal unit 117 is removed CP from receive signal, and FFT (Fast Fourier Transform, fast fourier transform) unit 118 is transformed to frequency-region signal by the reception signal of removing after CP.
The ascending resource assignment information of extraction unit 119 based on from control unit 102 inputs (for example, ascending resource assignment information before 4 subframes), from the frequency-region signal of FFT unit 118 inputs, extract uplink data and the PUCCH signal (for example, ack/nack signal) of each terminal.IDFT (Inverse Discrete Fourier transform: inverse discrete Fourier transformer inverse-discrete) unit 120 is transformed to time-domain signal by the signal being extracted by extraction unit 119, and this time-domain signal is outputed to data receiver unit 121 and ACK/NACK receiving element 122.
Data receiver unit 121 by the time-domain signal from IDFT unit 120 input, uplink decoding data.Then, data receiver unit 121 is using decoded uplink data as receiving data output.
ACK/NACK receiving element 122 extracts the ack/nack signal from each terminal from the time-domain signal of IDFT unit 120 inputs, to downlink data (PDSCH signal).Particularly, ACK/NACK receiving element 122 in the up unit frequency band that each terminal is set, from PUCCH region corresponding to the descending unit frequency band of the PDCCH signal with being configured to use the distribution of downlink data, with this PDCCH signal in extract ack/nack signal in the associated PUCCH (ACK/NACK resource) of the CCE that uses.Here, according to the CCE number calculating from control unit 102 CFI information input, each descending unit frequency band, can be used by each descending unit frequency band and descending unit frequency reel number, determine PUCCH region.Here, in the situation that the PDCCH signal of the downlink resource assignment information of the downlink data that comprises a plurality of units frequency band (PDSCH signal) has been distributed to for certain terminal the CCE of a plurality of descending units frequency band in base station 100, ACK/NACK receiving element 122, in the PUCCH region of descending unit frequency band to each, extracts ack/nack signal from No. CCE of the CCE with having used the distribution of downlink data associated PUCCH (ACK/NACK resource).Particularly, ACK/NACK receiving element 122 is being set in the up unit frequency band of terminal, based on according to being set to the CFI information spendable CCE number of each unit frequency band that calculate, a plurality of descending units frequency band of each unit frequency band of a plurality of descending unit frequency band of terminal, determine and be assigned with the PUCCH region to the ack/nack signal of downlink data.Then, ACK/NACK receiving element 122 has been used from the distribution with downlink data descending unit frequency band extracts ack/nack signal in corresponding PUCCH region.Thus, each ack/nack signal that ACK/NACK receiving element 122 obtains the downlink data of a plurality of units frequency band.The ACK/NACK of the ack/nack signal that then, ACK/NACK receiving element 122 extracts judges.
Fig. 2 means the block diagram of structure of the terminal 200 of present embodiment.Terminal 200 is used a plurality of descending units frequency band to receive data-signal (downlink data), and uses the PUCCH of a up unit frequency band will the ack/nack signal of this data-signal be sent to base station 100.
In the terminal 200 shown in Fig. 2, rf receiver unit 202 adopts the structure of variable frequency acceptance band, and the band information based on from 207 inputs of set information receiving element, change frequency acceptance band.Then, rf receiver unit 202 carries out wireless receiving processing (down-conversion, A/D conversion etc.) for take the wireless receiving signal (being ofdm signal) that frequency acceptance band receives here via antenna 201, and the reception signal of acquisition is outputed to CP removal unit 203.
CP removal unit 203 is removed CP from receive signal, and the reception signal after CP is removed in FFT unit 204 is transformed to frequency-region signal.This frequency-region signal is output to separative element 205.
Separative element 205 by from FFT unit 204 input signals be separated into the system information that comprises each community broadcast message, comprise set information high-rise control signal (for example, RRC signaling etc.), PCFICH signal, PDCCH signal and data-signal (PDSCH signal), the system information of described each community comprises for representing the PUCCH area information in PUCCH region.Then, separative element 205 outputs to broadcast message receiving element 206 by broadcast message, control signal is outputed to set information receiving element 207, PCFICH signal is outputed to PCFICH receiving element 208, PDCCH signal is outputed to PDCCH receiving element 209, PDSCH signal is outputed to PDSCH receiving element 210.
Broadcast message receiving element 206 is read system information (SIB) the broadcast message from separative element 205 inputs.In addition, broadcast message receiving element 206, by the PUCCH area information comprising in the system information of the associated descending unit frequency band of the up unit frequency band using in sending with PUCCH, outputs to map unit 214.Here, in PUCCH area information, comprise the starting position (resource number) in the PUCCH region of this up unit frequency band, for example, by SIB2 (system information block type2: system information block type 2) be broadcasted.
Set information receiving element 207, the control signal from separative element 205 input, reads and is set to the information of the up unit frequency band that sends for PUCCH of up unit frequency band this terminal, that send for data and descending unit frequency band and representing.Then, set information receiving element 207 outputs to PDCCH receiving element 209, rf receiver unit 202 and radio frequency transmitting element 217 as band information using the information reading.In addition, set information receiving element 207, the control signal from separative element 205 inputs, reads the information of the Termination ID for representing this terminal to set, and the information reading is outputed to PDCCH receiving element 209 as Termination ID information.
PCFICH receiving element 208 extracts CFI information the PCFICH signal from separative element 205 inputs.That is to say, each unit frequency band of a plurality of descending unit frequency band that 208 pairs of these terminals of PCFICH receiving element set obtains CFI information, and described CFI information has represented to be assigned with the OFDM code element number using in the PDCCH of resource allocation information of the downlink data that mails to this terminal.
Then, PCFICH receiving element 208 outputs to PDCCH receiving element 209 and map unit 214 by the CFI information extracting.
PDCCH receiving element 209, by carrying out blind decoding from the PDCCH signal of separative element 205 inputs, obtains the PDCCH signal (resource allocation information) that mails to this terminal.Here, PDCCH signal is assigned to respectively and is disposed at from the CCE of band information descending unit represented, that this terminal the is set frequency band of set information receiving element 207 input (that is, PDCCH).Particularly, first, the CFI information of PDCCH receiving element 209 based on from 208 inputs of PCFICH receiving element, determines the OFDM code element number that has been configured PDCCH to each descending unit frequency band.Then, PDCCH receiving element 209 is used from the Termination ID of this represented terminal of the Termination ID information of set information receiving element 207 inputs, the search volume of calculating this terminal.Here, the search volume calculating (forming No. CCE of CCE of search volume) is all identical between a plurality of descending unit frequency band that this terminal is set.Then, the PDCCH signal that PDCCH receiving element 209 distributes each CCE in the search volume to calculated carries out demodulation and decoding.Then, PDCCH receiving element 209 is for decoded PDCCH signal, the Termination ID that utilizes this terminal that Termination ID information represents, demasks to CRC bit, is the PDCCH signal that mails to this terminal thus by the PDCCH signal determining of CRC=OK (zero defect).PDCCH receiving element 209 is by carrying out above-mentioned blind decoding to sending each unit frequency band of PDCCH signal, thereby obtains the resource allocation information of this unit frequency band.Then, PDCCH receiving element 209 outputs to PDSCH receiving element 210 by mailing to the downlink resource assignment information comprising in the PDCCH signal of this terminal, and ascending resource assignment information is outputed to map unit 214.In addition, PDCCH receiving element 209 by constituent parts frequency band, detect the PDCCH signal that mails to this terminal CCE (CCE of CRC=OK) output to map unit 212 No. CCE.In addition, used a plurality of CCE for a PDCCH signal in the situation that, PDCCH receiving element 209 will start (number minimum) and output to map unit 214 No. CCE.
PDSCH receiving element 210, based on from PDCCH receiving element 209 downlink resource assignment information input, a plurality of descending units frequency band, is extracting and is receiving data (downlink data) from separative element 205 PDSCH signal input, a plurality of descending units frequency band.In addition, PDSCH receiving element 210 carries out error detection occurs for the reception data (downlink data) that extract.Then, in the situation that there is mistake in the result of error detection occurs in receiving data, PDSCH receiving element 210 generates NACK signal as ack/nack signal, in receiving data zero defect in the situation that, PDSCH receiving element 210 generates ack signal as ack/nack signal, and ack/nack signal is outputed to modulating unit 211.In addition, multiple-input and multiple-output) etc. in base station, 100 send (the Multiple-Input Multiple Output: carry out space division multiplexing by MIMO by PDSCH, and send in the situation of two data blocks (Transport Block), PDSCH receiving element 210 generates ack/nack signal for each data block.
Modulating unit 211 will be modulated from the ack/nack signal of PDSCH receiving element 210 inputs.In addition, in each descending unit frequency band, PDSCH signal is carried out to space division multiplexing, and send in the situation of two data blocks in base station 100, modulating unit 211 carries out QPSK modulation for ack/nack signal.On the other hand, the in the situation that of sending a data block in base station 100, modulating unit 211 carries out BPSK modulation for ack/nack signal.That is to say, modulating unit QPSK signal of 211 generations or bpsk signal are as the ack/nack signal of each descending unit frequency band.Then, modulating unit 211 outputs to map unit 214 by the ack/nack signal after modulation.
Modulating unit 212 will send data (uplink data) and modulate, and the data-signal after modulation is outputed to DFT (Discrete Fourier transform; Discrete Fourier transform (DFT)) unit 213.
DFT unit 213 is transformed to the data-signal from modulating unit 212 inputs the signal of frequency domain, and a plurality of frequency components that obtain are outputed to map unit 214.
Map unit 214 is according to the ascending resource assignment information from 209 inputs of PDCCH receiving element, by from DFT unit, the data-signals of 213 inputs are mapped to and are configured to the PUSCH of up unit frequency band.In addition, map unit 214, according to the PUCCH area information from 206 inputs of broadcast message receiving element (information that represents the starting position in PUCCH region), from PCFICH receiving element 208 CFI information input, each descending unit frequency band and from No. CCE of PDCCH receiving element input, is mapped to the ack/nack signal from modulating unit 211 inputs to be configured to the PUCCH of up unit frequency band.That is to say, map unit 214 is in the up unit frequency band that this terminal has been set, CCE number based on calculating according to the CFI information to each unit frequency band of a plurality of descending units frequency band that this terminal has been set, can use each unit frequency band of a plurality of descending units frequency band, is assigned with the PUCCH region of ack/nack signal to each unit band setting of a plurality of descending units frequency band.Then, map unit 214 is mapped to the PUCCH region that the descending unit frequency band that used in the distribution with downlink data is corresponding (that is, the ACK/NACK resource associated with the CCE of No. CCE from 209 inputs of PDCCH receiving element) by ack/nack signal.
For example, as shown in Figure 3, by frequency expansion sequence (the cyclic shift amount of ZAC (Zero Auto Correlation, zero auto-correlation) sequence) and secondary spread-spectrum sequence piece formula spreading codes (Block-wise spreading code) such as () Walsh (Walsh) sequences, define the ACK/NACK resource (A/N#0～#17) of PUCCH.Here, ACK/NACK resource number is associated with No. CCE 1 pair of 1 ground, in map unit 214, ack/nack signal be assigned to from associated frequency expansion sequence of No. CCE of PDCCH receiving element 209 input and secondary spread-spectrum sequence.In addition, in the situation that having sent PDSCH signal with a plurality of descending units frequency band, map unit 214 is the ack/nack signal to the PDSCH signal having sent with each descending unit frequency band, distribute to respectively with configured the distribution of this PDSCH signal in PUCCH region corresponding to the descending unit frequency band of the PDCCH that used, with the distribution of this PDSCH signal in the associated ACK/NACK resource of the CCE that used.
In addition, also can modulating unit 211, modulating unit 212, DFT unit 213 and map unit 214 be set to each unit frequency band.
IFFT unit 215 is transformed to time domain waveform by a plurality of frequency components that are mapped in PUSCH, and 216 pairs of these time domain waveforms of CP extra cell are added CP.
Radio frequency transmitting element 217 adopts the structure of variable transmission frequency band, and the band information based on from 207 inputs of set information receiving element, sets and sends frequency band.Then, the signal that 217 pairs of radio frequency transmitting elements have added CP carries out wireless transmission processing (up-conversion, D/A conversion etc.) and it is sent via antenna 201.
The details of the action of base station 100 and terminal 200 then, is described.
In the following description, the setup unit 101 (Fig. 1) of base station 100 to terminal 200 set in the downgoing line shown in Fig. 4 and the uplink system that You Liangge unit's frequency band forms respectively, two descending unit frequency bands (unit frequency band 0 and unit frequency band 1) and a up unit frequency band (unit frequency band 0).Therefore, no matter be the PDSCH signal receiving with which descending unit frequency band, terminal 200 is all used the resource area (ACK/NACK resource) with PUCCH on CCE up unit associated, that be configured Gei Liao unit's frequency band 0 frequency band having used in distribution at this PDSCH signal, and ack/nack signal is sent to base station 100.In addition, in Fig. 4, PUCCH region is set at the two ends of the unit frequency band of uplink, and a PUCCH is sent by frequency hopping in the first half and the later half of subframe.Therefore,, in the following description, as PUCCH region, a side region is only described.
In addition, be configured in PDCCH in each the descending unit frequency band shown in Fig. 4 by a plurality of CCE (CCE#1, CCE#3, CCE#3 ...) form.In addition, each ACK/NACK resources such as the ACK/NACK resource #1～# (k+j) shown in Fig. 4, for example corresponding respectively with the ACK/NACK resource (A/N#0～#17) shown in Fig. 3.In addition, the ACK/NACK resource (A/N#0～#17) shown in Fig. 3 represents to be equivalent to the ACK/NACK resource of 1RB, in the situation that more than 18 ACK/NACK resources is set, a plurality of RB are used.In addition, in the situation that a plurality of RB are used, ACK/NACK resource number from the RB at the two ends of frequency band towards center in order by additional number.
In addition, as shown in Figure 4, by distributing to the CFI information that configures the OFDM code element number of PDCCH in descending unit frequency band in the CFI information of PCFICH resource of each descending unit frequency band, the unit's of being illustrated in frequency band 0, be made as CFI0, and the CFI information that configures the OFDM code element number of PDCCH in the descending unit frequency band of the unit's of being illustrated in frequency band 1 is made as to CFI1.In addition, CFI0 and CFI1 get any value in 1～3 (that is, 1～3OFDM code element).Here, as shown in Figure 4, the spendable CCE number of descending unit frequency band of the control unit 102Jiang unit frequency band 0 of base station 100 is made as k (CCE#1～#k), and the CFI0 of unit frequency band 0 is made as to L.In addition, the CCE number that the descending unit frequency band of control unit 102Jiang unit frequency band 1 can be used is made as j (CCE#1～#j).
In addition, the allocation units 105 (Fig. 1) of base station 100 have been given the CCE#1～#k of descending unit frequency band of unit frequency band 0 of terminal 200 and any of the CCE#1～#j of the descending unit frequency band of unit frequency band 1 to setting, and distribute respectively the PDCCH signal of each descending unit frequency band.
In addition, the broadcast message generation unit 108 of base station 100 generates for representing the system information of starting position (resource number) in PUCCH region of the up unit frequency band of the unit frequency band 0 associated with the descending unit frequency band of unit frequency band 0.In addition, broadcast message generation unit 108 generates for representing the system information of starting position (resource number) in PUCCH region of the up unit frequency band of the unit frequency band 1 associated with the descending unit frequency band of unit frequency band 1.For example, these system informations are included in SIB2.
The broadcast message receiving element 206 of terminal 200 reads the starting position (resource number) in the PUCCH region in up unit that comprise respectively, associated with each descending unit frequency band frequency band in the system information (SIB2) of the unit frequency band 0 shown in Fig. 4 and unit frequency band 1.That is to say, the starting position in the PUCCH region in the up unit frequency band of broadcast message receiving element 206 unit's of reading frequency band 0 from the SIB2 (not shown) of the descending unit frequency band of the unit frequency band 0 shown in Fig. 4, and from the SIB2 (not shown) of the descending unit frequency band of the unit frequency band 1 shown in Fig. 4 the starting position in the PUCCH region in the up unit frequency band of the unit's of reading frequency band 1.
In addition, PCFICH receiving element 208 extracts CFI0 (=L) from distributed to the PCFICH signal of PCFICH resource of the unit frequency band 0 shown in Fig. 4, and extracts CFI1 from distributed to the PCFICH signal of PCFICH resource of unit frequency band 1.
Then, PDCCH receiving element 209 is determined the OFDM code element number that has been configured PDCCH in the descending unit frequency band of unit frequency band 0 based on CFI0, and based on CFI1, determines the OFDM code element number that has been configured PDCCH in the descending unit frequency band of unit frequency band 1.Then, the CCE in the search volume (not shown) of PDCCH receiving element 209Jiang unit frequency band 0 and unit frequency band 1 carries out blind decoding, determines the CCE that is assigned with the PDCCH signal (resource allocation information) that mails to this terminal.Here, the CCE that is sometimes assigned with the PDCCH signal (resource allocation information) that mails to this terminal has a plurality of.Thus, as shown in Figure 4, PDCCH receiving element 209 is by the PDCCH signal of having distributed to the PDCCH signal of the one or more CCE in the CCE#1～#k of descending unit frequency band of unit frequency band 0 and having distributed to the one or more CCE in the CCE#1～#j of descending unit frequency band of unit frequency band 1, and being judged to be is the PDCCH signal that mails to this terminal.
In addition, map unit 214 is in the up unit frequency band of the unit frequency band 0 shown in Fig. 4, the ack/nack signal of the ack/nack signal of the downlink data that the one or more CCE in the CCE#1～#k of applying unit frequency band 0 have been assigned with and downlink data that the one or more CCE in the CCE#1～#j of applying unit frequency band 1 have been assigned with, is mapped to the PUCCH region corresponding to descending unit frequency band of having used in the distribution with each downlink data.
Here, No. CCE of the CCE having used in distribution by spendable CCE number and downlink data in each the descending unit frequency band calculating based on CFI information (here for CFI0 and CFI1) (using in the situation of a plurality of CCE No. CCE for beginning), calculates for sending the PUCCH region (ACK/NACK resource) of the ack/nack signal of the downlink data being assigned with using the CCE of each descending unit frequency band.Particularly, first by following formula (1), ask spendable CCE in the descending unit frequency band of the frequency band i of unit of certain subframe to count N cCE(i).
N CCE(i)＝(L(i)*N RE_total-N RS-N PCFICH-N PHICH)/N RE_CCE···(1)
Wherein, the unit of i representation unit frequency band frequency reel number (in Fig. 4, i=0,1).In addition, L (i) represents the CFI information (, L (i)=1～3) of the descending unit frequency band (the frequency band i of unit) of certain subframe, N here rE_totalrepresent RE (Resource Element) number comprising in 1OFDM code element, N rSthe RE number using in the contrast signal that represents to comprise in the individual OFDM code element of L (i), N pCFICHthe RE number using in the PCFICH signal that represents to comprise in the individual OFDM code element of L (i), N pHICHrepresent PHICH (the Physical Hybrid-ARQ Indicator Channel: RE number physical mixed arq indicating channel) using in signal (descending ack/nack signal), N comprising in the individual OFDM code element of L (i) rE_CCEthe RE number that represents every 1CCE.For example, in LTE, N pCFICH=16, N rE_CCE=36.N in addition, rSdepend on antenna port number, can be calculated by terminal 200.In addition, N pHICHcan by terminal 200, be calculated according to the PHICH information of being notified by broadcast message.In addition, the value before the transmission that terminal 200 is for example used ack/nack signal 4 subframes is regularly as L (i).This is because terminal, after the PDCCH signal for receiving and PDSCH signal decodes processing etc., sends ack/nack signal after 4 subframes.In addition, RE means the resource units of 1 subcarrier in 1OFDM code element.
For example, through type (1) calculate, in the constituent parts frequency band i shown in Fig. 4 (wherein, i=0,1), spendable CCE counts N cCE(i) be N cCE(0)=k and N cCE(1)=j.
In addition, use certain subframe the frequency band i of unit descending unit frequency band CCE and the ack/nack signal of the downlink data that has been assigned with is mapped to PUCCH resource (ACK/NACK resource number) n calculating according to following formula (2) pUCCH.
n PUCCH = N PUCCH + Σ m = 0 i - 1 N CCE ( m ) + n CCE ( i ) · · · ( 2 )
Wherein, N pUCCHexpression is by the starting position (resource number) in SIB2 PUCCH region notice, corresponding with the descending unit frequency band of the frequency band i of unit of the descending unit frequency band of the frequency band i of unit, n cCE(i) No. CCE of the CCE that PDCCH has been used in sending in the descending unit frequency band of representation unit frequency band (i+1).In addition, in formula (2), the starting position N in the PUCCH region of being notified by SIB2 has been described pUCCHsituation, but the relative position in the starting position based on the whole PUCCH region that configures in up unit frequency band of distance, in the situation of the PUCCH resource (ACK/NACK resource) of using in the transmission of definition ack/nack signal, in formula (2), do not need N pUCCH.
For example, in the constituent parts frequency band i shown in Fig. 4 (wherein, i=0,1), the CCE n in formula (2) cCE(i) be n cCE(0)=1～k and n cCE(1)=1～j.
Therefore, as shown in Figure 4, map unit 214 is according to formula (2), the starting position N in the SIB2 of the descending unit frequency band of Jiang Congyou unit's frequency band 0 notice, corresponding with the descending unit frequency band of unit frequency band 0 PUCCH region pUCCHplay k ACK/NACK resource #1～#k, be set as the PUCCH region corresponding with the descending unit frequency band of unit frequency band 0.That is to say, as shown in Figure 4, ACK/NACK resource #1～#k is associated respectively for the CCE#1～#k of the descending unit frequency band of unit frequency band 0.
Then, as shown in Figure 4, the CCE of map unit 214 based on calculating according to formula (1) counts N cCE(0) the starting position N in the PUCCH region of=k and unit frequency band 0 pUCCH, by formula (2), determine the starting position (N in the PUCCH region corresponding with the downstream bands of unit frequency band 1 pUCCH+ N cCE(0)).In addition, map unit 214, will be from starting position (N according to formula (2) pUCCH+ N cCE(0)) play j ACK/NACK resource # (k+1)～# (k+j) and be set as the PUCCH region corresponding with the descending unit frequency band of unit frequency band 1.That is to say, as shown in Figure 4, ACK/NACK resource # (k+1)～# (k+j) is associated respectively for the CCE#1～#j of the descending unit frequency band of unit frequency band 1.
In addition, map unit 214, by the ack/nack signal of the downlink data being assigned with using respectively the CCE#1～#k of the unit frequency band 0 shown in Fig. 4, is mapped to respectively corresponding to the ACK/NACK resource #1～#k in the PUCCH region of unit frequency band 0.In addition, as shown in Figure 4, map unit 214 by the CCE#1～#j of applying unit frequency band 1 respectively and the ack/nack signal of the downlink data being assigned be mapped to respectively corresponding to ACK/NACK resource # (the k+1)～# (k+j) in the PUCCH region of unit frequency band 1.That is to say, map unit 214 is spendable CCE number in the descending unit frequency band of unit frequency band 0 based on CFI information (in Fig. 4 for CFI0), sets changeably the starting position in the PUCCH region corresponding with the descending unit frequency band of unit frequency band 1.In other words, map unit 214 is spendable CCE number in the descending unit frequency band of unit frequency band 0 based on CFI information (in Fig. 4 for CFI0), sets changeably the end position in the PUCCH region corresponding with the descending unit frequency band of unit frequency band 0.Particularly, map unit 214 guarantees that the PUCCH region corresponding with the descending unit frequency band of unit frequency band 0 is equivalent to the number corresponding to CCE number that can use in the descending unit frequency band with unit frequency band 0.
On the other hand, same with terminal 200, CFI0 and the CFI1 of the ACK/NACK receiving element 122 of base station 100 based on from control unit 102 inputs, the CCE that calculates each descending unit frequency band according to formula (1) counts N cCE.In addition, same with terminal 200, ACK/NACK receiving element 122 is set the PUCCH region (ACK/NACK resource #1～#k Fig. 4 shown in) corresponding with the descending unit frequency band of unit frequency band 0 and the PUCCH region (ACK/NACK resource # (k+1)～# (k+j) Fig. 4 shown in) corresponding with the descending unit frequency band of unit frequency band 1.In addition, ACK/NAACK receiving element 122, in the PUCCH region corresponding with each descending unit frequency band, extracts respectively the ack/nack signal to the PDSCH signal of each descending unit frequency band from ACK/NACK resource corresponding to No. CCE of CCE with having distributed PDCCH signal.
Like this, terminal 200 is in the up unit frequency band that this terminal has been set, based on according to be set to the CFI information of each descending unit frequency band of this terminal calculate, spendable CCE number (the CCE number that base station 100 can send) in each descending unit frequency band, the starting position in the PUCCH region corresponding with each descending unit frequency band is controlled on every subframe ground.
Here, be configured ACK/NACK resource required in the PUCCH to each up unit frequency band and depend on the CCE number using in the PDCCH of configuration to each descending unit frequency band.In addition, be configured the CCE number that uses in the PDCCH to each descending unit frequency band different in every subframe.That is to say, in each up unit frequency band, the PUCCH region corresponding from each descending unit frequency band (with the associated ACK/NACK number of resources of the CCE of each descending unit frequency band) is different to every subframe.
But terminal 200 is calculated spendable CCE number in each descending unit frequency band by the CFI information based on every subframe is notified, thereby control the starting position in the PUCCH region corresponding with each descending unit frequency band.Therefore, terminal 200 can guarantee to be equivalent to the ACK/NACK number of resources corresponding with the CCE number that can use at each descending unit frequency band (the CCE number that base station can send) to every subframe.That is to say, terminal 200 can guarantee with spendable CCE number in each descending unit frequency band, in each descending unit frequency band for ACK/NACK resource corresponding to the CCE number of cutting apart of PDSCH signal.That is to say, in terminal 200, in the up unit frequency band of the unit frequency band 0 shown in Fig. 4, for unit frequency band 0 and unit frequency band 1 both sides' descending unit frequency band, only guarantee respectively required minimal ACK/NACK resource.
Like this, according to present embodiment, terminal, based on the CFI information to every subframe notice from base station, is calculated spendable CCE number in each descending unit frequency band, and the CCE number based on calculating, and controls the PUCCH region to each descending unit frequency band.Thus, terminal can be set in the up unit frequency band of this terminal, and every subframe is guaranteed and is set to required minimal PUCCH region (ACK/NACK resource) corresponding to each descending unit frequency band of this terminal.In addition, terminal is that system information (SIB) and CFI information are controlled PUCCH region based on existing signaling in LTE.That is to say, in the present embodiment, without LTE-A newly being appended to the signaling that mails to terminal from base station.Therefore, according to present embodiment, even in the situation that send a plurality of ack/nack signals of the downlink data to having sent respectively with a plurality of descending units frequency band from a up unit frequency band, also can not increase signaling, and reduce the PUCCH region (ACK/NACK number of resources) in up unit frequency band.
In addition, according to present embodiment, by the PUCCH region limits in up unit frequency band, needs guaranteed to Min., thereby can guarantee more PUSCH resource, so can improve the data throughout of uplink.In addition, in descending unit frequency band, without newly appending signaling, so PDCCH resource does not increase, thereby can prevent that the data throughout of downgoing line from declining.
In addition, according to present embodiment, terminal, by being set in the up unit frequency band of this terminal, makes the PUCCH region corresponding with each descending unit frequency band adjacent, thereby all PUCCH regions is gathered and are configured in a place.Therefore, terminal can be distributed more continuous resource (RB) for PUSCH signal.Here, base station is in the RB situation having continued for terminal distribution PUSCH signal time-division accessory, only notice starts No. RB and RB number (or finishing No. RB), so can further reduce the notice bit for notifying resource to distribute, can improve allocation efficiency of resource.
In addition, for example, as LTE-A, each descending unit frequency band be broadband (for example, 20MHz frequency band), in situation, also can the CCE of each descending unit frequency band not guaranteed to be equivalent to for take the maximum number guaranteed by maximum OFDM code element number (being 3OFDM code element) here.This is because in the situation that each descending unit frequency band is broadband, the resource of the every 1OFDM code element that can use in PDCCH is more.That is to say, in most subframes, need maximum 3OFDM code element little as the probability of the OFDM code element number using in PDCCH (CFI information).That is to say, even if maximum CCE number is not guaranteed in base station 100, also can be for the sufficient CCE of a plurality of terminal distribution, and can obtain sufficient frequency scheduling effect.For example, can be in the situation that guarantee maximum 80 CCE in the descending unit frequency band of 20MHz frequency band in 1 subframe, half i.e. CCE of 40 that maximum number also can only be guaranteed in base station 100.Thus, terminal 200 only to the CCE number calculating based on CFI information half 40 CCE guarantee PUCCH region, thereby can reduce PUCCH region, can improve the throughput of upstream data.
In addition, in the present embodiment, the setting of the PUCCH in the up unit frequency band of the unit frequency band 0 shown in Fig. 4 has been described, as the setting in a routine PUCCH region.But in the present invention, the PUCCH for the up unit frequency band of the unit frequency band 1 shown in Fig. 4, also can carry out the setting in PUCCH region equally with above-mentioned execution mode.
(execution mode 2)
In the present embodiment, by be set in a plurality of descending unit frequency band of terminal, be set to PUCCH region corresponding to the associated descending unit frequency band of the up unit frequency band of terminal, the PUCCH region more corresponding than the descending unit frequency band beyond the descending unit frequency band associated with up unit frequency band, is set in the end of up unit frequency band.
Below specifically describe present embodiment.In the following description, the up unit frequency band of unit frequency band i (wherein, i is unit reel number frequently) and the descending unit frequency band of the frequency band i of unit are associated.Here, with the broadcast message notice of the descending unit frequency band up unit frequency band associated with descending unit frequency band.In addition, the broadcast message of the system information (SIB2) of the descending unit frequency band by comprising the frequency band i of the unit of distributing to, by the PUCCH area information of the starting position in the up unit frequency band for representation unit frequency band i, corresponding with the descending unit frequency band of the frequency band i of unit PUCCH region (the PUCCH config shown in Fig. 5) from base station 100 (Fig. 1) notice to terminal 200 (Fig. 2).
For example, in Fig. 5, the broadcast message generation unit 108 of base station 100 will, for the system information (SIB2) of the starting position (resource number) in the up unit frequency band of representation unit frequency band 0 (unit frequency band 1), corresponding with the descending unit frequency band of unit frequency band 0 (unit frequency band 1) PUCCH region, be set the descending unit frequency band to unit frequency band 0 (unit frequency band 1).
The establishing method 1 and 2 of PUCCH region (ACK/NACK resource) is described below.
< establishing method 1 >
In this establishing method, terminal 200 is being set in the up unit frequency band of this terminal, from descending unit frequency band a plurality of descending unit frequency band that this terminal has been set, associated with this up unit frequency band, according to the order of the descending unit frequency band predetermining (unit frequently reel number), the PUCCH region corresponding with a plurality of descending units frequency bands set in order from the starting position of the described resource area with the associated descending unit frequency band broadcast of described up unit frequency band.
Here, the setup unit 101 (Fig. 1) of base station 100 by the downgoing line shown in Fig. 5 and the downgoing line system that You Liangge unit's frequency band forms respectively, two descending unit frequency bands (unit frequency band 0 and unit frequency band 1) and a up unit frequency band (unit frequency band 0) set to terminal 1, and two descending unit frequency bands (unit frequency band 0 and unit frequency band 1) and a up unit frequency band (unit frequency band 1) set to terminal 2.Here, terminal 1 and terminal 2 have the structure identical with terminal 200 (Fig. 2) in execution mode 1.
In addition, as shown in 5, same with execution mode 1 (Fig. 4), the CFI information of unit frequency band 0 is made as to CFI0, the CFI information of Bing Jiang unit's frequency band 1 is made as CFI1.In addition, as shown in Figure 5, same with execution mode 1 (Fig. 4), the CCE number that the descending unit frequency band of Jiang unit's frequency band 0 can be used is made as k (CCE#1～#k), and the spendable CCE number of descending unit frequency band of Bing Jiang unit's frequency band 1 is made as j (CCE#1～#j).
Therefore, the allocation units 105 (Fig. 1) of base station 100 distribute respectively the PDCCH signal of each terminal to setting to the CCE#1～#k of descending unit frequency band of unit frequency band 0 of terminal 1 and terminal 2 and any of the CCE#1～#j of the descending unit frequency band of unit frequency band 1.
In addition, in the up unit frequency band of the unit frequency band 0 shown in Fig. 5 or unit frequency band 1, each map unit 214 of terminal 1 and terminal 2 is to the CCE#1～#k of applying unit frequency band 0 respectively and the ack/nack signal of the downlink data being assigned with and to the CCE#1～#j of applying unit frequency band 1 respectively and the ack/nack signal of the downlink data being assigned with, and is mapped to the PUCCH region corresponding to descending unit frequency band of using in the distribution with each downlink data.
Here, from the descending unit frequency band associated with each up unit frequency band according to the unit order of reel number frequently, from the end of each up unit frequency band, the starting position of the PUCCH region of the descending unit frequency band broadcast associated with each up unit frequency band (that is, with) rises and sets in order for sending the PUCCH region (ACK/NACK resource) of the ack/nack signal of the downlink data being assigned with using the CCE of each descending unit frequency band.
Particularly, in the up unit frequency band of the frequency band i of unit, from the starting position in the PUCCH region of the SIB2 notice of the descending unit frequency band by the frequency band i of unit, according to unit frequency band (i), unit frequency band ((i+1) mod N cc), unit frequency band ((i+2) mod N cc) ..., the frequency band ((i+N of unit cc-1) mod N cc) order, set the PUCCH region corresponding with each descending unit frequency band.Wherein, computing mod represents modular arithmetic, N ccrepresent descending unit frequency band number.
That is to say, as shown in Figure 5, in the up unit frequency band of the map unit 214 unit frequency band 0 of terminal 1, by k ACK/NACK resource #1～#k the starting position in the SIB2 notice of the descending unit frequency band from by unit frequency band 0, corresponding with the descending unit frequency band of unit frequency band 0 PUCCH region, be set as the PUCCH region corresponding with the descending unit frequency band of unit frequency band 0.Then, same with execution mode 1, as shown in Figure 5, j ACK/NACK resource # (k+1)～# (k+j) is played in the starting position (# (k+1)) in the PUCCH region that the descending unit frequency band of the map unit 214Jiang Congyu unit frequency band 1 of terminal 1 (=(0+1) mod2) is corresponding, is set as the PUCCH region corresponding with the descending unit frequency band of unit frequency band 1.That is to say, as shown in Figure 5, according to the order of the descending unit frequency band of the descending unit frequency band of unit frequency band 0, unit frequency band 1, from the end of the up unit frequency band of unit frequency band 0, (that is, the starting position in the PUCCH region of the SIB2 broadcast of the descending unit frequency band by unit frequency band 0) risen and set in order the PUCCH region corresponding with each descending unit frequency band.
On the other hand, as shown in Figure 5, in the up unit frequency band of the map unit 214 unit frequency band 1 of terminal 2, by j ACK/NACK resource #1～#j the starting position in the SIB2 notice of the descending unit frequency band from by unit frequency band 1, corresponding with the descending unit frequency band of unit frequency band 1 PUCCH region, be set as the PUCCH region corresponding with the descending unit frequency band of unit frequency band 1.Then, as shown in Figure 5, k ACK/NACK resource # (j+1)～# (j+k) is played in the starting position (# (j+1)) in the PUCCH region that the descending unit frequency band of the map unit 214Jiang Congyu unit frequency band 0 of terminal 2 (=(1+1) mod2) is corresponding, is set as the PUCCH region corresponding with the descending unit frequency band of unit frequency band 0.That is to say, as shown in Figure 5, according to the order of the descending unit frequency band of the descending unit frequency band of unit frequency band 1, unit frequency band 0, from the end of the up unit frequency band of unit frequency band 1, (that is, the starting position in the PUCCH region of the SIB2 broadcast of the descending unit frequency band by unit frequency band 1) risen and set in order the PUCCH region corresponding with each descending unit frequency band.
That is to say, in each up unit frequency band, than PUCCH region corresponding to descending unit frequency band beyond the descending unit frequency band associated with each up unit frequency band, be set at the end of up unit frequency band with each up unit frequency band PUCCH region that associated descending unit frequency band is corresponding respectively.In addition, from set with the frequency band of each the up unit frequency band PUCCH that associated descending unit frequency band is corresponding respectively (, the end of up unit frequency band) rise, towards the centre frequency of up unit frequency band (, the inner side of up unit frequency band), set in order and the up unit frequency band PUCCH region that associated descending unit frequency band descending unit frequency band is in addition corresponding respectively.Here, same with execution mode 1, the CFI information of each terminal (terminal 200) based on each descending unit frequency band and every subframe is controlled to the starting position with each up unit frequency band PUCCH region that associated descending unit frequency band descending unit frequency band is in addition corresponding respectively.
In LTE-A, not only require to take in LTE-A terminal, and require to take in LTE terminal.Here, with regard to LTE terminal, be set a up unit frequency band and a descending unit frequency band.In addition, now, with regard to LTE terminal, must be set be mutually related up unit frequency band and descending unit frequency band.That is to say, in the up unit frequency band that LTE terminal has been set, the PUCCH region that LTE terminal is used is set regularly by the SIB2 (broadcast message) of the descending unit frequency band associated with this up unit frequency band.
Therefore, in this establishing method, in the up unit frequency band using in LTE terminal, PUCCH region corresponding to the descending unit frequency band associated with this up unit frequency band (the descending unit frequency band that LTE terminal is used) must be configured in the end of up unit frequency band.In addition, based on CFI information, than PUCCH region corresponding to the descending unit frequency band using with LTE terminal, PUCCH region corresponding to descending unit frequency band (the descending unit frequency band that for example, only LTE-A terminal is used) beyond the descending unit frequency band associated with the up unit frequency band of LTE terminal use is configured in the inner side of up unit frequency band.Thus, can be from the end of up unit frequency band towards the carrier frequency (centre frequency) of up unit frequency band, each PUCCH region corresponding with a plurality of descending units frequency bands configured continuously.That is to say, same with execution mode 1, terminal 200 can be set changeably based on CFI information the starting position in the PUCCH region that descending unit frequency band beyond descending unit frequency band associated in the up unit frequency band using with LTE terminal is corresponding, and seamlessly setting makes the continuous frequency band in PUCCH region from setting the end of the up unit frequency band of having given this terminal.Therefore, according to this establishing method, same with execution mode 1, PUCCH region can be suppressed to Min..
Like this, according to this establishing method, even the in the situation that of LTE-A terminal and LTE terminal coexistence, also can support LTE terminal at each up unit frequency band, and same with execution mode 1, reduce PUCCH region.
In addition, according to this establishing method, in certain up unit frequency band, the PUCCH region that starting position is controlled by CFI information (for example, the PUCCH region corresponding with the descending unit frequency band of only LTE-A terminal use), compare the PUCCH region corresponding with descending unit frequency band corresponding to this up unit frequency band, be configured in changeably inner side.Thus, even inferior in the less situation of CFI information, in the less situation of the stock number of PUCCH, the end that is configured in up unit frequency band is also always gathered in PUCCH region.Therefore,, according to this establishing method, the resource in continuous broadband can be guaranteed to the resource as PUSCH, and can improve allocation efficiency of resource.
In addition, according to this establishing method, the starting position in PUCCH region and the descending units N of system of the SIB2 of the descending unit frequency band based on by associated with up unit frequency band notice cc, at each up unit frequency band, according to the order of the unit frequency band having preset, set PUCCH region.Therefore, terminal can only be used existing control information and determine uniquely the PUCCH region corresponding with all descending units frequency bands, and does not need new signaling.
In addition, in this establishing method, the unit frequency band number that system has been described is the situation of two (Fig. 5).But in the present invention, the unit frequency band number of system is not limited to the situation of two.For example, the situation that the unit frequency band number of use Fig. 6 illustrative system is 3.As shown in Figure 6, in the up unit frequency band of unit frequency band 0, from the end of up unit frequency band, rise (starting position in the PUCCH region of the SIB2 notice by unit frequency band 0), in order the setting PUCCH region corresponding with each descending unit frequency band of unit frequency band 0, unit frequency band 1, unit frequency band 2.Equally, as shown in Figure 6, in the up unit frequency band of unit frequency band 1, from the end of up unit frequency band, rise (starting position in the PUCCH region of the SIB2 notice by unit frequency band 1), in order the setting PUCCH region corresponding with each descending unit frequency band of unit frequency band 1, unit frequency band 2, unit frequency band 0.Up unit frequency band for unit frequency band 2 is also same.
< establishing method 2 >
In this establishing method, terminal 200 is being set in the up unit frequency band of this terminal, from be set to descending unit frequency band a plurality of descending unit frequency band of this terminal, associated with this up unit frequency band start, according to the order of the near descending unit frequency band of the carrier frequency of the distance descending unit frequency band associated with up unit frequency band, from the end of up unit frequency band, start sequentially to set the PUCCH region corresponding with a plurality of descending units frequency bands.
In the following description, the unit frequency band number of illustrative system is the situation of 3.
For example, as shown in Figure 7, in the up unit frequency band of unit frequency band 0, from the end of up unit frequency band (starting position in the PUCCH region of the SIB2 notice by unit frequency band 0), according to the order of unit frequency band 0, unit frequency band 1, unit frequency band 2, be set the PUCCH region corresponding with each descending unit frequency band.That is to say, be set the terminal 200 of up unit frequency band of unit frequency band 0 according to the order in PUCCH region corresponding to the descending unit frequency band of the carrier frequency of the descending unit frequency band of PUCCH region corresponding to the descending unit frequency band of the nearest unit frequency band 1 of the carrier frequency of the descending unit frequency band of PUCCH region corresponding to the descending unit frequency band with unit frequency band 0, Yu Ju unit's frequency band 0, Yu Ju unit's frequency band 0 unit frequency band 2 farthest, from the end of the up unit frequency band of unit frequency band 0, set in order each PUCCH region.
On the other hand, as shown in Figure 7, in the up unit frequency band of unit frequency band 2, from the end of up unit frequency band (starting position in the PUCCH region of the SIB2 notice by unit frequency band 2), according to the order of unit frequency band 2, unit frequency band 1, unit frequency band 0, set the PUCCH region corresponding with each descending unit frequency band.That is to say, be set the terminal 200 of up unit frequency band of unit frequency band 2 according to the order in PUCCH region corresponding to the descending unit frequency band of the carrier frequency of the descending unit frequency band of PUCCH region corresponding to the descending unit frequency band of the nearest unit frequency band 1 of the carrier frequency of the descending unit frequency band of PUCCH region corresponding to the descending unit frequency band with unit frequency band 2, Yu Ju unit's frequency band 2, Yu Ju unit's frequency band 2 unit frequency band 0 farthest, from the end of the up unit frequency band of unit frequency band 2, set in order each PUCCH region.
In addition, in Fig. 7, at the central unit frequency band 1 that is positioned at a plurality of units frequency band (, the unit frequency band adjacent with unit frequency band 2 with unit frequency band 0) in up unit frequency band, with Fig. 6 of establishing method 1 similarly, according to the order of unit frequency band 1, unit frequency band 2, unit frequency band 0, from the end of up unit frequency band, set in order the PUCCH region corresponding with each descending unit frequency band.But, in the up unit frequency band of unit frequency band 1, also can, according to the order of unit frequency band 1, unit frequency band 0, unit frequency band 2, from the end of up unit frequency band, set in order the PUCCH region corresponding with each descending unit frequency band.In addition, same with execution mode 1, terminal 200, based on CFI information, is set the starting position in the PUCCH region corresponding with each descending unit frequency band changeably.
Here, when importing initial stage of LTE-A system etc., suppose the more situation of terminal that has been defined reception bandwidth (for example, 40MHz frequency band).For example, suppose following situation, that is, at Fig. 7 Zhong Ruojiangmei 1 unit frequency band, be made as 20MHz, only use the terminal of continuous two descending unit frequency bands (40MHz frequency band) reception downlink data more.Now, according to this establishing method, two the PUCCH regions corresponding with two continuous descending unit frequency bands, the possibility being configured on the adjacent frequency band in up unit frequency band uprises, and is gathered the end that is configured in up unit frequency band.
For example, in Fig. 7, terminal 200 is set to two descending unit frequency bands of unit frequency band 1 and unit frequency band 2, and in any situation of a up unit frequency band of the unit's of setting frequency band 1 or unit frequency band 2, terminal 200 is set in the PUCCH region corresponding with each descending unit frequency band the end of up unit frequency band.Particularly, be set the terminal 200 of up unit frequency band of the unit frequency band 1 shown in Fig. 7 according to the order of unit frequency band 1, unit frequency band 2, the PUCCH region corresponding with each descending unit frequency band be set in to the end of up unit frequency band.Equally, be set the terminal 200 of up unit frequency band of the unit frequency band 2 shown in Fig. 7 according to the order of unit frequency band 2, unit frequency band 1, the PUCCH region corresponding with each descending unit frequency band be set in to the end of up unit frequency band.Thus, in each up unit frequency band, untapped PUCCH region (, the PUCCH region corresponding to descending unit frequency band of Shi Yu unit's frequency band 0) can be set in to the frequency band of the inside in up unit frequency band here, so can guarantee more continuous resource for PUSCH.
In addition, even if receive the CFI information that band-limited terminal is not known the descending unit frequency band beyond the reception bandwidth of this terminal, also can suitably set PUCCH region (ACK/NACK resource), described PUCCH region is assigned with mailing to the ack/nack signal of the downlink data of this terminal.For example, in Fig. 7, terminal 200 has been set in the situation of two descending unit frequency bands of unit frequency band 1 and unit frequency band 2, even if terminal 200 is not known the CFI information of unit frequency band 0, also only the CFI information based on unit frequency band 1 and unit frequency band 2 is set the PUCCH region of up unit frequency band (unit frequency band 1 or unit frequency band 2).
Like this, according to this establishing method, even if exist in a large number receive the limited terminal of bandwidth in the situation that, the possibility of having been used in order from being set in the PUCCH region of end of each up unit frequency band also uprises.That is to say, the PUCCH region that the limited terminal of not received bandwidth is used is set on the frequency band of the inside in up unit frequency band, so can guarantee that the resource in continuous broadband is as the resource of PUSCH.
In addition, in this establishing method, than PUCCH region corresponding to descending unit frequency band beyond the descending unit frequency band associated with this up unit frequency band, the PUCCH region that the descending unit frequency band associated with up unit frequency band is corresponding is set at the end of up unit frequency band.In addition, same with execution mode 1, terminal 200 is set the starting position in the PUCCH region corresponding with each descending unit frequency band changeably based on CFI information.Therefore, according to this establishing method, same with establishing method 1, even the in the situation that of LTE-A terminal and LTE terminal coexistence, also can support LTE terminal at each up unit frequency band, and also same with execution mode 1, reduce PUCCH region.
In addition, in this establishing method, the unit frequency band number that system has been described is the situation of 3 (Fig. 7).But in the present invention, the unit frequency band number of system is not limited to the situation of 3.For example, the unit frequency band number of illustrative system is the situation of 4.Here, suppose each up unit frequency band and each descending unit frequency band associated (not shown) of unit frequency band 0～4.Therefore,, in the up unit frequency band of unit frequency band 0, according to the order of unit frequency band 0,1,2,3, from the end of up unit frequency band, set in order the PUCCH region corresponding with each descending unit frequency band.Equally, in the up unit frequency band of unit frequency band 1, according to the order of unit frequency band 1,0,2,3 (or, unit frequency band 1,2,0,3), from the end of up unit frequency band, set in order the PUCCH region corresponding with each descending unit frequency band.Equally, in the up unit frequency band of unit frequency band 2, according to the order of unit frequency band 2,1,3,0 (or, unit frequency band 2,3,1,0), from the end of up unit frequency band, set in order the PUCCH region corresponding with each descending unit frequency band.Equally, in the up unit frequency band of unit frequency band 3, according to the order of unit frequency band 3,2,1,0, from the end of up unit frequency band, set in order the PUCCH region corresponding with each descending unit frequency band.
The establishing method 1 and 2 in the PUCCH region of present embodiment has been described above.
Like this, in the present embodiment, in LTE-A, even the in the situation that of LTE terminal coexistence, also can support LTE terminal, and same with execution mode 1, can not increase signaling and reduce the PUCCH region (ACK/NACK number of resources) in up unit frequency band.
In addition, in the present embodiment, illustrated that up unit frequency band and descending unit frequency band are symmetrical system.But the present invention also can be applicable to up unit frequency band and descending unit frequency band is asymmetrical situation.For example, as shown in Figure 8, at up unit frequency band (two up unit frequency bands) and descending unit frequency band (three descending unit frequency bands), be in asymmetrical situation, a certain up unit frequency band (Tu8Zhong unit's frequency band 1) is likely associated with a plurality of descending units frequency band (Tu8Zhong unit's frequency band 1 and 2).Now, the SIB2 separately by the descending unit frequency band of the unit frequency band 1 shown in Fig. 8 and the descending unit frequency band of unit frequency band 2, notifies the starting position in the PUCCH region corresponding with each descending unit frequency band to terminal.Now, as shown in Figure 8, in the up unit frequency band of unit frequency band 1, the starting position in the PUCCH region of the SIB2 notice of terminal based on by each descending unit frequency band, sets the PUCCH region corresponding with each descending unit frequency band of unit frequency band 1 and unit frequency band 2 regularly.On the other hand, with above-mentioned establishing method 1 or establishing method 2 similarly, terminal is set PUCCH region corresponding to descending unit frequency band (Tu8Zhong Wei unit's frequency band 0) beyond descending unit frequency band associated in the up unit frequency band of Yu unit's frequency band 1 changeably.
In addition, in Fig. 6～Fig. 8, the starting position in the PUCCH region of notifying by SIB2 also can be in the end of the frequency band of up unit frequency band, and base station can freely be set.For example, in LTE, base station is applicable to send by being called N being provided with rB (2)the skew of fixed resource of CQI information of setting parameter after, set the PUCCH region that ack/nack signal is used.Now, by by guarantee regularly in advance, for the resource settings that sends required a certain CQI information in the end of the frequency band of unit frequency band, thereby can similarly to PUSCH, guarantee more continuous and wider resource with the above-mentioned effect having illustrated.
(execution mode 3)
In the present embodiment, public CFI information is set respectively in base station between a plurality of descending units frequency band.
The control unit 102 (Fig. 1) of the base station 100 of present embodiment is by being set between a plurality of descending unit frequency band of each terminal, the downlink data that mails to each terminal is distributed equably, thereby control, so that the CCE number using in the distribution of downlink data is impartial between a plurality of descending units frequency band.That is to say, control unit 102 makes the OFDM code element number that uses in the transmission of PDCCH signal identical at all descending units frequency band.Therefore, control unit 102 is set public CFI information respectively in a plurality of descending units frequency band.Then, control unit 102 outputs to PCFICH generation unit 106 by the CFI information of having set.
The CFI information of PCFICH generation unit 106 based on from control unit 102 input, i.e. public CFI information each descending unit frequency band, generate PCFICH signal.
The details of the action of base station 100 in present embodiment and terminal 200 then, is described.Here, as shown in Figure 9, the unit frequency band number of illustrative system is the situation of two.In addition, two descending unit frequency bands of unit frequency bands 0 and unit frequency band 1 and the up unit frequency band of unit frequency band 0 are set for terminal 200 in base station 100.
As shown in Figure 9, in each descending unit frequency band of the control unit 102 unit frequency band 0 of base station 100 and unit frequency band 1, set public CFI information.
In addition, control unit 102 is set as k by spendable CCE number in the descending unit frequency band of the unit frequency band 0 that terminal 200 is set and unit frequency band 1.That is to say, control unit 102, for terminal 200, is set equably to spendable CCE number in each descending unit frequency band.Therefore, allocation units 105 are distributed to respectively the CCE#1～#k of descending unit frequency band of unit frequency band 0 that terminal 200 has been set and any of the CCE#1～#k of the descending unit frequency band of unit frequency band 1 by the PDCCH signal of each descending unit frequency band.
Then, the map unit 214 of terminal 200, by the ack/nack signal of the ack/nack signal of the downlink data being assigned with using respectively the CCE#1～#k of the unit frequency band 0 shown in Fig. 9 and the downlink data that has been assigned with using respectively the CCE#1～#k of the unit frequency band 1 shown in Fig. 9, is mapped to the PUCCH region associated with each descending unit frequency band.
Here, according to the formula of execution mode 1 (2), calculate the PUCCH region (ACK/NACK resource) of using in sending the ack/nack signal of downlink data, the data of described downlink data for using the CCE of each descending unit frequency band to be assigned with.But, replace the formula (1) of execution mode 1 and according to following formula (3), ask spendable CCE in the descending unit frequency band of the frequency band i of unit in a certain subframe to count N cCE(i).
N CCE(i)＝(L com*N RE_total-N RS-N PCFICH-N PHICH)/N RE_CCE···(3)
Wherein, L combe illustrated in CFI information (for example, L public in a plurality of descending units frequency band com=1～3).That is to say, formula (3) is that the L of formula (1) (i) is replaced into L comresulting formula after (public CFI information).
For example, have following situation, that is, in a plurality of descending unit frequency band (Tu9Zhong unit's frequency band 0 and 2) that terminal 200 has been set, the reception that the PCFICH signal of a certain descending unit frequency band occurs sends out mistake.Here, as long as the bandwidth of each descending unit frequency band is identical, the maximum number of the CCE that the CFI information based on each descending unit frequency band calculates (the CCE number that each descending unit frequency band can be used) is also identical.Therefore,, in each up unit frequency band (Tu9Zhong unit's frequency band 0), (in Fig. 9, the ACK/NACK resource of k) is identical for the size in the PUCCH region corresponding with each descending unit frequency band.
Therefore, by base station 100 for the public CFI information of each descending unit band setting, even if thereby in the situation that there is the reception error of the PCFICH signal of a certain descending unit frequency band in terminal 200, if the PCFICH signal that the arbitrary descending unit frequency band beyond the descending unit frequency band of reception error has occurred normally can be decoded, can determine the PCFICH signal of all descending unit frequency bands.That is to say, terminal 200, when setting the PUCCH region corresponding with each descending unit frequency band, also can be used the CFI information of arbitrary descending unit frequency band.In addition, in terminal 200, successfully received in the descending unit frequency band of PDCCH signal, CFI information is normally received.That is to say, terminal 200 has been in the situation that successfully received the PDCCH signal of arbitrary descending unit frequency band, can determine and be set to PUCCH region corresponding to the descending unit of this terminal.
Therefore, even in the situation that there is the reception error of the PCFICH signal of a certain descending unit frequency band, terminal 200 also can prevent from sending the ack/nack signal to the PDSCH signal of a certain descending unit frequency band with wrong PUCCH region, and in base station 100, can prevent to conflict with the ACK/NACK of other-end.
In addition, even in the situation that the bandwidth of each descending unit frequency band is mutually different, base station 100 notifies the information that represents the bandwidth of each descending unit frequency band to each terminal.In addition, base station 100 is by for constituent parts bandwidth assignment and the bandwidth CCE number of proportional number roughly, thereby also sets public CFI between the different unit frequency band of bandwidth.Thus, each terminal based on can normally receive PDCCH signal descending unit frequency band CFI information and for representing the information of the bandwidth of each descending unit frequency band, can determine the PUCCH region corresponding with other descending unit frequency band.Therefore,, even in the mutually different situation of bandwidth of each descending unit frequency band, terminal 200 also can prevent from sending the ack/nack signal to the PDSCH signal of a certain descending unit frequency band with wrong PUCCH region.
In addition, for example, in the situation that in a plurality of descending unit frequency band that terminal 200 has been set, a certain descending unit frequency band is in the DRX (Discontinuous Reception discontinuous reception), in order to set the PUCCH region in the up unit frequency band associated with this descending unit frequency band, terminal 200 need to receive the CFI information (PCFICH signal) of the descending unit frequency band in DRX.In addition, in receiving the limited terminal of bandwidth, the CFI information of the CFI information of the descending unit frequency band in DRX and other descending unit frequency band cannot be received simultaneously.But, by by base station 100 for the public CFI information of each descending unit band setting, thereby the CFI information of the descending unit frequency band beyond the descending unit frequency band that terminal 200 can be based in DRX is determined the CFI information of the descending unit frequency band in DRX.
Therefore,, even in the situation that there is the descending unit frequency band in DRX, terminal 200 also need not be received CFI information and can be set the PUCCH region corresponding with each descending unit frequency band by the descending unit frequency band in DRX.That is to say, terminal 200 receives CFI information without stopping DRX in the descending unit frequency band in DRX, so can prevent that the power based on DRX from reducing effect decline.In addition, for example, even if receive the limited terminal 200 of bandwidth in the situation that cannot receive the CFI information of the descending unit frequency band in DRX and the CFI information of other descending unit frequency band simultaneously, the CFI information of descending unit frequency band that also can be based on other, determines the CFI information of the descending unit frequency band in DRX.
Like this, according to present embodiment, by using public CFI information in a plurality of descending units frequency band, even thereby in the situation that terminal cannot receive the CFI information of certain descending unit frequency band, also same with execution mode 1, can not increase signaling, and reduce the PUCCH region (ACK/NACK number of resources) in up unit frequency band.
In addition, in the present embodiment, base station, between a plurality of descending units frequency band, is set public CFI information and the downlink data that mails to a plurality of terminals is distributed.Therefore, by equalization effect, data allocations approximate equality almost between a plurality of descending units frequency band.Therefore,, even if public CFI information is set in base station between a plurality of descending units frequency band, also there is hardly the deteriorated of throughput.
(execution mode 4)
In being configured the PDCCH of descending unit frequency band to each, except mailing to the resource allocation information (RB assignment information) of each terminal, also comprise: MCS (Modulation and Coding Scheme: modulation and coded system) information, HARQ (Hybrid Automatic Retransmission reQuest: mix request automatically and repeat) information and for controlling PUCCH transmitted power bit (PUCCH TPC (the Transmission Power Control: transmission power control) bit) etc. of the transmitted power of PUCCH.Here, in the situation that send a plurality of ack/nack signals of the downlink data to having sent respectively with a plurality of descending units frequency band from a up unit frequency band, even without by PUCCH transmission power control bit from a plurality of descending units frequency band notification terminal, and only from the descending unit frequency band notice associated with up unit frequency band.
On the contrary, if, there is following situation, in the frequency band notice PUCCH of a plurality of descending unit transmission power control bit from being set, terminal side by side receives a plurality of PUCCH transmission power control bits with a plurality of descending units frequency band, cannot suitably control thus the transmission power control of PUCCH.Here, PUCCH transmission power control bit for example, represents by the relative value (,-1dB, 0dB ,+1dB ,+2dB) of the transmitted power when last time sending.
Therefore, for example, in the situation of the represent respectively-1dB of PUCCH transmission power control bit of two descending unit frequency bands, terminal sends PUCCH with-2dB.On the other hand, in the situation that the represent-1dB of PUCCH transmission power control bit of two descending unit frequency bands, while there is the reception error of a PUCCH transmission power control bit, terminal sends PUCCH with the transmitted power of-1dB.Like this, if from the frequency band notice PUCCH of a plurality of descending units transmission power control bit, exist and cannot suitably carry out the situation of the transmission power control of the PUCCH in terminal.
Therefore, in the present embodiment, base station is for the terminal that has been set a plurality of descending units frequency band, uses the field of PUCCH transmission power control bit of the PDCCH of a certain descending unit frequency band, notifies the CFI information of other descending unit frequency band.Particularly, base station by be set to the CFI information distribution of the associated descending unit frequency band of the up unit frequency band of terminal in the field of the PUCCH of PDCCH transmission power control bit, described PDCCH be configured in be set in a plurality of descending unit frequency band of terminal, be set to the descending unit frequency band beyond the associated descending unit frequency band of the up unit frequency band of terminal.
The control unit 102 (Fig. 1) of the base station 100 of present embodiment to be configured to be set to the field of PUCCH transmission power control bit of the PDCCH on the associated descending unit frequency band of the up unit frequency band of terminal of resource distribution object, minute pairing is set to the PUCCH transmission power control bit of up unit frequency band of this terminal.On the other hand, 102 pairs of control units be configured in to be set to the field of PUCCH transmission power control bit of the PDCCH on the descending unit frequency band beyond the associated descending unit frequency band of the up unit frequency band of terminal of resource distribution object, distribute and be set to the CFI information of the associated descending unit frequency band of the up unit frequency band of this terminal.
The PDCCH receiving element 209 (Fig. 2) of the terminal 200 of present embodiment, by carrying out blind decoding from the PDCCH signal of separative element 205 inputs, obtains the PDCCH signal that mails to this terminal.Here, whether PDCCH receiving element 209 according to the descending unit frequency band that has been assigned with the PDCCH signal that mails to this terminal be and be set to the associated descending unit frequency band of the up unit frequency band of this terminal, judgement to the field distribution of the PUCCH transmission power control bit in PDCCH signal the content of control information.
Particularly, PDCCH receiving element 209 be set in the associated descending unit frequency band of the up unit frequency band of this terminal, extract control information in the field that is dispensed on the PUCCH transmission power control bit in PDCCH signal as PUCCH transmission power control bit.In addition, PDCCH receiving element 209 outputs to radio frequency transmitting element 217 (not shown) by the represented transmission power value of PUCCH transmission power control bit extracting.
On the other hand, PDCCH receiving element 209 be set in the descending unit frequency band beyond the associated descending unit frequency band of the up unit frequency band of this terminal, extract control information in the field that is dispensed on the PUCCH transmission power control bit in PDCCH signal as be set to the CFI information of the associated descending unit frequency band of the up unit frequency band of this terminal.Then, PDCCH receiving element 209 outputs to map unit 214 by the CFI information extracting.
The CFI information of map unit 214 based on from PCFICH receiving element 208 input, from the CFI information of PDCCH receiving element 209 inputs and from No. CCE of PDCCH receiving element 209 inputs, the ack/nack signal from modulating unit 211 inputs is mapped to and is configured to the PUCCH of up unit frequency band.That is to say, similarly, the CFI information based on each descending unit frequency band, sets being set to the starting position in PUCCH region in the up unit frequency band of this terminal, corresponding with each descending unit frequency band for map unit 214 and execution mode 1 or 2.But, map unit 214 from PDCCH receiving element 209 input CFI information in the situation that, use this CFI information as be set to the CFI information of the associated descending unit frequency band of the up unit frequency band of this terminal.That is to say, terminal 200 use to be set in a plurality of descending unit frequency band of this terminal, with to be set to the PDCCH of the descending unit frequency band beyond the associated descending unit frequency band of the up unit of this terminal frequency band distributed, with the CFI information of the associated descending unit frequency band of up unit frequency band, set the PUCCH region corresponding with a plurality of descending units frequency band difference.
The details of the action of base station 100 in present embodiment and terminal 200 then, is described.Here, as shown in figure 10, the unit frequency band number of illustrative system is the situation of two.In addition, unit frequency band 0 and each descending unit frequency band of unit frequency band 1 and the up unit frequency band of unit frequency band 0 are set for terminal 200 in base station 100.In addition, as shown in figure 10, be configured on the PDCCH of descending unit frequency band to each, be set respectively RB assignment information, MCS information, HARQ information and PUCCH transmission power control than the field of the various control informations of top grade.
As shown in figure 10,102 pairs of the control units of base station 100 be configured to set to the PDCCH on the descending unit frequency band of the associated unit frequency band 0 of the up unit frequency band of the unit frequency band 0 of terminal 200, for example distribute RB assignment information (resource allocation information), MCS information, HARQ information and PUCCH transmission power control bit.
On the other hand, as shown in figure 10,102 pairs of control units be configured to be for example set, to the PDCCH on descending unit frequency band beyond the associated descending unit frequency band of the up unit frequency band of unit frequency band 0 of terminal 200, unit frequency band 1, the CFI information (CFI0) of distributing the descending unit frequency band of RB assignment information, MCS information, HARQ information and unit frequency band 0.That is to say, 102 pairs of control units be set to the field of the PUCCH transmission power control bit on the descending unit frequency band beyond the associated descending unit frequency band of the up unit frequency band of terminal 200, distribute be set to the associated descending unit frequency band of the up unit frequency band of terminal 200 CFI information and replace PUCCH transmitted power bit.
On the other hand, with execution mode 1 or 2 similarly, as shown in figure 10, the map unit of terminal 200 214 is used CFI to set the starting position in the PUCCH region corresponding with the descending unit frequency band of unit frequency band 1.In addition, same with execution mode 2, map unit 214 by be set in a plurality of descending unit frequency band of this terminal, be set to PUCCH region corresponding to the associated descending unit frequency band of the up unit frequency band of this terminal, than PUCCH region corresponding to descending unit frequency band beyond the descending unit frequency band associated with this up unit frequency band, be set in the end of up unit frequency band.
Here, map unit 214 is used from the CFI0 (distributing to the CFI0 of the PCFICH of the unit frequency band 0 shown in Figure 10) of PCFICH receiving element 208 inputs or from the CFI0 of PDCCH receiving element 209 inputs (being assigned to the CFI0 of field of PUCCH transmission power control bit of the PDCCH of the unit frequency band 1 shown in Figure 10), sets the starting position in the PUCCH region corresponding with the descending unit frequency band of unit frequency band 1.
Thus, for example, even in the situation that there is the reception error of PCFICH signal (CFI0) of the descending unit frequency band of the unit frequency band 0 shown in Figure 10, if terminal 200 also can normally be decoded the PDCCH signal of the descending unit frequency band of unit frequency band 1, can determine the CFI0 of the descending unit frequency band of unit frequency band 0.That is to say, even in the situation that there is the reception error of PCFICH signal (CFI0) of the descending unit frequency band of unit frequency band 0, terminal 200 also can be based on CFI0 and the starting position in the PUCCH region of the unit's of setting frequency band 1.
In addition, by other descending unit frequency band (unit frequency band 1 in Figure 10) PDCCH notice be set to the associated descending unit frequency band (unit frequency band 0 in Figure 10) of the up unit frequency band of terminal 200 (unit frequency band 0 in Figure 10), be the CFI information (CFI0 in Figure 10) of the descending unit frequency band of the end that is set at up unit frequency band (unit frequency band 0 in Figure 10), PUCCH region.Thus, even in the situation that terminal 200 has been mistaken the reception of the PCFICH signal of the descending unit (unit frequency band 0 in Figure 10) in the setting PUCCH region, end to up unit frequency band, by other the PDCCH signal of descending unit frequency band (unit frequency band 1 in Figure 10), also can determine the CFI information of having mistaken the descending unit frequency band receiving.Here, owing to by CRC, PDCCH being carried out to error detection occurs, so if PDCCH is CRC=OK, the CFI information having sent thus be take high probability as correct information.On the other hand, cannot carry out error detection occurs to PCFICH, so reliability is lower than the CFI information in PDCCH.Therefore, terminal 200 is preferentially used the CFI information of notifying in PDCCH in definite PUCCH resource.
Therefore, even in the situation that the reception of the PCFICH signal of the descending unit frequency band in the setting PUCCH region, end to up unit frequency band has been mistaken, the PUCCH region that terminal 200 also can prevent from mistaking sends ack/nack signal, and in base station 100, can prevent and other-end between ack/nack signal clash.
For example, in the situation that be set to the descending unit frequency band of terminal 200 be two, terminal 200 is by normally receiving the PDCCH signal (CFI0) of the unit frequency band 1 shown in Figure 10, can prevent in base station the conflict of the ack/nack signal of 100 terminal room completely.In addition, in the situation that be set to the descending unit frequency band of terminal 200 be 3, for example, in the situation that except the unit frequency band 0 shown in Figure 10 and unit frequency band 1 applying unit frequency band 2 (not shown), terminal 200 is passed through the normally PDCCH signal (CFI0) of recruiting unit's frequency band 1, and the PDCCH signal (CFI1) of recruiting unit's frequency band 2 normally, can prevent in base station the conflict of the ack/nack signal of 100 terminal room.
Like this, according to present embodiment, even be set to the associated descending unit frequency band of the up unit frequency band of terminal, be in the descending unit frequency band of the end that is set at up unit frequency band, PUCCH region, occurred in situation that the misconnection of PCFICH signal receives, terminal also can be determined CFI information by the PDCCH signal normally receiving in the descending unit frequency band at other.Thus, obtain the effect same with execution mode 2, and from be set to the associated descending unit frequency band of the up unit frequency band of terminal in order when setting in order from the end of up unit frequency band with PUCCH region corresponding to a plurality of descending units frequency bands, can reduce the probability in the PUCCH region that terminal mistaken for each descending unit band setting.
In addition, according to present embodiment, even in the situation that a plurality of descending units frequency band is set to terminal, by notifying the descending unit frequency band of PUCCH transmission power control bit to be set to one, thereby also can compatibly carry out the transmission power control of PUCCH.
In addition, in the present embodiment, the field of the PUCCH transmission power control bit in PDCCH signal, except by PCFICH signal notice CFI information, is also used, notice CFI information in base station.That is to say, owing to notifying CFI information with existing control channel, so without the signaling of new control information.
In addition, following situation has been described in the present embodiment, that is, the field of the PUCCH transmission power control bit in PDCCH signal is used in base station, notifies the CFI information of a descending unit frequency band.But in the present invention, the field of the PUCCH transmission power control bit in PDCCH signal is used in base station, can notify the CFI information of a plurality of descending units frequency band, also can notify the part CFI information of a certain descending unit frequency band.
In addition, in the present embodiment, for example in the situation that the descending unit frequency band of the unit frequency band 0 shown in Figure 10 in DRX, base station also can be to the PUCCH transmission power control bit in the PDCCH signal of the descending unit frequency band of unit frequency band 1 field, distribute PUCCH transmission power control bit.Thus, though at the descending unit frequency band of unit frequency band 0 in DRX, terminal also can compatibly be controlled the transmitted power of the PUCCH of the up unit frequency band of configuration Gei Liao unit frequency band 0.
In addition, in the present embodiment, illustrated that the setting of PUCCH of the one end in the up unit frequency band of the unit frequency band 0 shown in Figure 10 is as the setting in a routine PUCCH region.But, in the present invention, for the PUCCH of the other end of up unit frequency band of the unit frequency band 0 shown in Figure 10 and the PUCCH at the two ends of the up unit frequency band of unit frequency band 1, also can similarly carry out the setting in PUCCH region with above-mentioned execution mode.
Above, each execution mode of the present invention has been described.
In addition, in the above-described embodiment, the up unit frequency band that sends PUCCH signal (for example, ack/nack signal) in each terminal is also referred to as resident component carrier (Anchor component carrier), reference component carrier wave (reference component carrier) or principal component carrier wave (master component carrier).
In addition, following situation has been described in the above-described embodiment, that is, two descending unit frequency bands are used in base station, mail to the PDCCH signal of each terminal.But in the present invention, a descending unit frequency band for example also can only be used for a terminal in base station, send PDCCH signal.Now, same with above-mentioned execution mode, terminal is being set in the up unit frequency band of this terminal, uses the PUCCH region corresponding to descending unit frequency band of using in the transmission with PDCCH signal, transmission ack/nack signal.Thus, for example, can prevent and use conflicting of ack/nack signal between the LTE terminal of same descending unit frequency band.In addition, base station sends in the situation of PDCCH signal with a descending unit frequency band each terminal, and the descending unit frequency band using while sending this PDCCH signal is also referred to as resident component carrier, reference component carrier wave or principal component carrier wave.
In addition, following situation has been described in the above-described embodiment, that is, terminal is used and is configured to the PUCCH of a up unit frequency band, sends ack/nack signal.But, the present invention also can be applicable to terminal be configured respectively to the PUCCH of a plurality of up units frequency bands send the situation of ack/nack signal.
In addition, frequency band polymerization (Band aggregation) is also sometimes referred to as carrier aggregation (Carrier aggregation).In addition, frequency band polymerization is not limited to connect the situation of continuous frequency band, also can connect discontinuous frequency band.
In addition, in the present invention, also can use C-RNTI (Cell-Radio Network Temporary Identifier, Cell Radio Network Temporary Identifier/Identity, Cell-RNTI) as Termination ID.
In the present invention, it can be both the multiplying each other of (that is, CRC bit and Termination ID) between bit that shielding (scrambling) is processed, and also bit can be added each other, calculated the mod2 (that is, the remainder divided by 2 o'clock by addition result) of addition result.
In addition, in the above-described embodiment, illustrate that Liao Jiang unit's frequency band is defined as the frequency band of the bandwidth with maximum 20MHz and be the situation of the base unit of communication band.But, unit frequency band sometimes also by as give a definition.For example, descending unit frequency band is defined as sometimes according to BCH (the Broadcast Channel from base station broadcast, broadcast channel) the downstream bands information in is divided the frequency band of gained, or the frequency band of the definition of the dispersion width according to PDCCH decentralized configuration when the frequency domain, or the frequency band being sent out at core SCH (synchronization channel, synchronizing channel).In addition, up unit frequency band is sometimes defined as according to the upstream band information from the BCH of base station broadcast and divides the frequency band of gained or near center, comprise PUSCH, the base unit of the communication band below the 20MHz that comprises PUCCH (Physical Uplink Control Channel) in two end portions.In addition, unit frequency band is also recited as component carrier (Component carrier).
In addition, associated also can the regulation by the uplink information (ul-EARFCN:E-UTRA Absolute Radio Frequency Channel Number) in the system information (SIB) of notifying to terminal from base station by descending unit frequency band of up unit frequency band and descending unit frequency band.In addition, the uplink information in SIB is stipulated by 3GPP TS36.331V8.4.0.
In addition, also can use the n1Pucch-AN that stipulated by 3GPP TS36.331V8.4.0 as using SIB from base station to the starting position (resource number) in the PUCCH region of terminal notice.In up unit frequency band, PUCCH region is positioned at the outside (that is, end) of frequency band, and the value of n1Pucch-AN is less.In addition, as the starting position in PUCCH region, can use the N with 3GPP TS36.211V8.5.0 regulation pUCCH (1), also can notify from being equivalent to be offset the resource N of CQI transmission use rB (2)the relative position of resulting position.In addition, in 3GPP TS36.211V8.5.0, the PUCCH resource that terminal is used is to be called n pUCCH (1)variable name represent.
In addition, in the present invention, terminal is in order to determine the PUCCH region of using in the transmission of ack/nack signal, need to be grasped the information (for example, the bandwidth of descending unit frequency band number, each descending unit frequency band or number (ID) of each descending unit frequency band etc.) relevant with intrasystem descending unit frequency band.In the present invention, the information relevant with this descending unit frequency band can be notified with SIB, also can be to each terminal notice.In the situation that the information relevant with descending unit frequency band to each terminal notice, base station also can only notify be set in the up unit frequency band of terminal, the information of the descending unit frequency band that is set of the PUCCH region of the PUCCH region more lateral more corresponding than the descending unit frequency band with this terminal use (maybe may use).Thus, terminal can be determined the starting position in the PUCCH region corresponding with each descending unit frequency band, and can from base station, notify the amount of information to terminal to be suppressed to required Min. the information relevant with descending unit frequency band.
In addition, in the present invention, also can limit the number that can set the descending unit frequency band in PUCCH region to a up unit frequency band.For example, in thering is the system of four descending unit frequency bands and four up unit frequency bands, also descending unit frequency band and up unit frequency band can be divided into respectively to 2 groups that by two descending unit frequency bands and two up unit frequency bands, are formed.Thus, the number that can set the descending unit frequency band in PUCCH region to a up unit frequency band is defined as to two.In addition, now, with two up unit frequency bands on the same group not, send the ack/nack signal of the downlink data to being sent by three above descending unit frequency bands.
In addition, following situation has been described in the above-described embodiment, that is, terminal is used for each the mutually different PUCCH of frequency band of descending unit region and is sent a plurality of ack/nack signals to the downlink data sending respectively with a plurality of descending units frequency band.But, also the present invention can be applicable to terminal and for the downlink data sending respectively with a plurality of descending units frequency band, send the situation (ACK/NACK bundling:ACK/NACK binding) of an ack/nack signal.In addition, also the present invention can be applicable to following situation, that is, terminal sends the situation of the ack/nack signal of the downlink data sending respectively with a plurality of descending units frequency band (selection of ACK/NACK channel (channel selection) or ACK/NACK multiplexing (multiplexing) with a PUCCH region (ACK/NACK resource) of selecting from a plurality of PUCCH region (ACK/NACK resource).
In addition, in the above-described embodiment, the CCE number by determining based on CFI information has been described, has set the example in PUCCH region.But, in the present invention, for the bandwidth of each unit frequency band, the relation between CFI and CCE number because of antenna number or PHICH number slightly different, but constant, so also can set the fixing PUCCH region of depending on CFI for the bandwidth of each unit frequency band.In addition, the bandwidth of unit frequency band also can be different between unit frequency band.
In addition, in the above-described embodiment, the PUCCH region of the descending unit frequency band associated with a certain up unit frequency band is set with the end from this up unit frequency band.Here, for the two ends of RBCong unit's frequency band of PUCCH, rise by additional index in order.That is to say, according to PUCCH resource number order from small to large, the RB at the two ends of Jiang Qicong unit's frequency band plays configuration in order.Therefore, in the present invention, also can from the little side of PUCCH resource number, set the PUCCH region of the descending unit frequency band associated with a certain up unit frequency band.
In addition, the channel with BCH, P-BCH (Primary BCH) or D-BCH (Dynamic BCH) etc. sends broadcast message (SIB).
In addition, in the above-described embodiment, for example understand and form situation of the present invention with hardware, but the present invention also can realize by software.
In addition, the LSI that each functional block of using for the explanation of above-mentioned execution mode is used as integrated circuit conventionally realizes.These functional blocks both can be integrated into a chip individually, also can comprise part or all and be integrated into a chip.Although referred to herein as LSI, according to degree of integration, can be called as IC, system LSI, super large LSI (Super LSI) or especially big LSI (Ultra LSI).
In addition, the method that realizes integrated circuit is not limited only to LSI, also can realize with special circuit or general processor.Also can use can programming after LSI manufactures field programmable gate array), or the connection of circuit unit of restructural LSI inside and the reconfigurable processor of setting FPGA (Field Programmable Gate Array:.
Moreover, along with semi-conductive technological progress or the appearance of other technology of derivation thereupon, if there is the new technology that can substitute the integrated circuit of LSI, certainly can utilize this new technology to carry out the integrated of functional block.Also exist the possibility of applicable biotechnology etc.
The disclosed content of specification, accompanying drawing and specification digest that the Japanese patent application laid of submitting on March 16th, 2009 is willing to comprise in 2009-063031 is all quoted in this application.
Industrial applicibility
The present invention can be applicable to mobile communication system etc.

Claims (9)

1. radio communication terminal device, is used a plurality of descending units frequency bands for communication, comprising:
Receiving element, receive the control format indication information of the 1st associated descending unit frequency band of the up unit frequency band with being set in this device in described a plurality of descending units frequency band, the control format indication information of described the 1st descending unit frequency band is distributed in the transmission power control field of the control channel that is configured in the 2nd descending unit frequency band different from described the 1st descending unit frequency band, reception is disposed at the control format indication information of described the 2nd descending unit frequency band of the control format indication information channel of described the 2nd descending unit frequency band, reception is allocated in the transmitting power control signal of the transmission power control field of the control channel that is configured in described the 1st descending unit channel, described control format indication information is illustrated in the code element number using in the control channel of the resource allocation information that has distributed the downlink data that mails to described device,
Setup unit, in the up unit frequency band that described device set, the control format indication information of the k-1 based in described a plurality of descending units frequency band descending unit frequency band, each descending unit frequency band to described a plurality of descending units frequency band, setting has distributed k resource area in the described up unit frequency band of the response signal of the downlink data with k descending unit frequency band transmission, and k is more than 1 integer; And
Map unit, the response signal corresponding with described downlink data that described use k descending unit frequency band sent is mapped to k resource area in described up unit frequency band.
2. radio communication terminal device as claimed in claim 1,
Described setup unit, by resource area in described a plurality of descending units frequency band, corresponding with described the 1st descending unit frequency band, with respect to the resource area corresponding with described the 2nd descending unit frequency band, is set in the end side of described up unit frequency band.
3. radio communication terminal device as claimed in claim 2,
Described setup unit from described the 1st descending unit frequency band, according to the order of the descending unit frequency band predetermining, by with described a plurality of descending units frequency bands corresponding resource area respectively, from the starting position of the resource area by with described the 1st descending unit frequency band broadcast, set in order.
4. radio communication terminal device as claimed in claim 2,
Described setup unit is from the descending unit frequency band associated with described up unit frequency band, order with the near descending unit frequency band of distance and the carrier frequency of described the 1st descending unit frequency band, by with described a plurality of descending units frequency bands corresponding resource area respectively, from the end of described up unit frequency band, set in order.
5. radio communication terminal device as claimed in claim 1,
Described setup unit is used public described control format indication information in described a plurality of descending units frequency band, sets with described a plurality of descending units frequency bands and distinguishes corresponding resource area.
6. radio communication terminal device as claimed in claim 2,
Described setup unit is used the described control format indication information with described the 2nd descending unit frequency band, set and described a plurality of descending units frequency bands corresponding resource area respectively, the described control format indication information of described descending unit frequency band has been assigned in described a plurality of descending units frequency band and described control channel described the 1st descending unit frequency band descending unit frequency band in addition.
7. radio communication base station device, comprising:
Generation unit, for the radio communication terminal device that uses a plurality of descending units frequency bands for communication, each descending unit frequency band to described a plurality of descending units frequency band generates control format indication information, and described control format indication information is illustrated in the code element number using in the control channel of the resource allocation information that has distributed the downlink data that mails to described radio communication terminal device;
Transmitting element, send the control format indication information of the 1st descending unit frequency band associated with up unit frequency band in described a plurality of descending units frequency band, the control format indication information of described the 1st descending unit frequency band is distributed in the transmission power control field of the control channel that is configured in the 2nd descending unit frequency band different from described the 1st descending unit frequency band, transmission is disposed at the control format indication information of described the 2nd descending unit frequency band of the control format indication information channel of described the 2nd descending unit frequency band, transmission is allocated in the transmitting power control signal of the transmission power control field of the control channel that is configured in described the 1st descending unit channel, and
Receiving element, in the up unit frequency band that described radio communication terminal device is set, the described control format indication information of the k-1 based in described a plurality of descending units frequency band descending unit frequency band, determine and to have distributed the response signal of the downlink data with k descending unit frequency band transmission, k resource area in up unit frequency band, k is more than 1 integer, resource area in described up unit frequency band is to each the descending unit band setting in described a plurality of descending units frequency band, in k resource area from described up unit frequency band corresponding to the descending unit frequency band of the distribution use with at described downlink data, extract described response signal.
8. the method for carrying out in using the radio communication terminal device of a plurality of descending units frequency bands for communication, said method comprising the steps of:
Receive the control format indication information of the 1st associated descending unit frequency band of the up unit frequency band with being set in this device in described a plurality of descending units frequency band, the control format indication information of described the 1st descending unit frequency band is distributed in the transmission power control field of the control channel that is configured in the 2nd descending unit frequency band different from described the 1st descending unit frequency band, reception is disposed at the control format indication information of described the 2nd descending unit frequency band of the control format indication information channel of described the 2nd descending unit frequency band, reception is allocated in the step of transmitting power control signal of the transmission power control field of the control channel that is configured in described the 1st descending unit channel, described control format indication information is illustrated in the code element number using in the control channel of the resource allocation information that has distributed the downlink data that mails to described radio communication terminal device, and
In the up unit frequency band that described radio communication terminal device is set, the control format indication information of the k-1 based in described a plurality of descending units frequency band descending unit frequency band, each descending unit frequency band to described a plurality of descending units frequency band, setting has distributed the step to k resource area in the described up unit frequency band of the response signal of the described downlink data with k descending unit frequency band transmission, and k is more than 1 integer.
9. the method for carrying out at radio communication base station device, comprises the following steps:
For the radio communication terminal device that uses a plurality of descending units frequency bands for communication, the step that each descending unit frequency band of described a plurality of descending units frequency band is generated to control format indication information, described control format indication information is illustrated in the code element number using in the control channel of the resource allocation information that has distributed the downlink data that mails to described radio communication terminal device;
Send the control format indication information of the 1st descending unit frequency band associated with up unit frequency band in described a plurality of descending units frequency band, the control format indication information of described the 1st descending unit frequency band is distributed in the transmission power control field of the control channel that is configured in the 2nd descending unit frequency band different from described the 1st descending unit frequency band, transmission is disposed at the control format indication information of described the 2nd descending unit frequency band of the control format indication information channel of described the 2nd descending unit frequency band, transmission is allocated in the step of transmitting power control signal of the transmission power control field of the control channel that is configured in described the 1st descending unit channel, and
In the up unit frequency band that described radio communication terminal device set, the described control format indication information of the k-1 based in described a plurality of descending units frequency band descending unit frequency band, determine and to have distributed the response signal of the downlink data with k descending unit frequency band transmission, k resource area in up unit frequency band, k is more than 1 integer, resource area in described up unit frequency band is to each the descending unit band setting in described a plurality of descending units frequency band, in k resource area from described up unit frequency band corresponding to the descending unit frequency band of the distribution use with described downlink data, extract the step of described response signal.
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